Upcoming prototype / September 20, 2026
Version 28.7
A focused update.
Updated shell details, LED housing and light guide, with hardware and wiring references now visible. The native play-cap and PCB-laminate overlaps have cleared; the remaining fit work is documented.
Experimental prototype · Fit review open. This publishes the supplied design with traceable exports. Physical qualification remains pending. Golden remains 28.1 / R3.4.
- Width
- 80 mm
- Height
- 150 mm
- Depth
- 24 mm
Bare shell. Rim envelope: 84.2 × 154.2 × 28 mm. Projecting details extend beyond the bare shell.
13 native CAD bodies across 11 supplied STL files. The shell/frame integration and material choices remain part of the prototype review.
Native Fusion geometry. Colours and exploded spacing are illustrative. Visible hardware and wiring are included in assembled/inside modes and hidden in exploded mode. One hidden wire body and non-solid PCB sheets remain in original Fusion.
28.7 identifies this September 20 snapshot. The original Fusion filename retains 28_1_R3_6. This updates 28.6 / September 19. The 80 × 150 × 24 mm bare-shell envelope is unchanged. Earlier releases remain available.
What changed from 28.6
Four native print bodies changed. Nine are unchanged in the native solid comparison.
- Shell details
- The front shell and rear shell change locally. The previous play-cap/front-shell and both PCB-laminate/shell overlaps are absent above the 0.001 mm³ reporting threshold.
- LED housing and light guide
- The LED housing and one optical body have local material removed. The second optical body is unchanged. Optical performance and the LED housing’s connected fit still need testing.
- Reference connections visible
- The source now shows 15 hardware and 32 wire solids that were hidden in 28.6. The inside view includes them; the exploded view hides these groups for clarity.
- A fresh rear-shell export
- The supplied rear-shell STL is byte-for-byte unchanged from September 19 even though Fusion’s rear shell changed. This handoff includes a newly generated rear-shell STL and STEP.
Use the native-position set for this update. Original files are retained for traceability. The supplied rear-shell STL is superseded by 07_Rear_Shell.stl in the new parts package.
A quick look inside
45 seconds · Silent visual overview with on-screen explanation.
45-second visual overview
Walkie_One_28_7_Overview.mp4
MP4 · 608 KB
Silent overview with on-screen explanation.
File checksum
SHA-256: bf560235d49b8c0f14398e30d57851355f0b910b7abfaae6a439d6bdaa07f71eOverview transcript
Overview_Transcript.md
MD · 1 KB
File checksum
SHA-256: 4af46421dacc56c7e3184bb84158dd9e8b46e0320fa93c2df971031bca823845Everything together for the next prototype
Source files, matched derivatives and a clear record of what remains to test.
- Illustrated guide
- Eleven pages cover changes from 28.6, source authority, dimensions, parts, materials, actual CAD views, remaining fits and first-article assembly.
- Native-position exports
- 13 individual STEP files and 13 STL alternatives, plus the 13-body review assembly and full reference STEP. Millimetres; import at 100%.
- Original source preserved
- The supplied F3D and 11 original STL files remain unchanged in the complete ZIP. Each derivative maps to its original occurrence and body.
- Build and test records
- Parts/materials, reference-body inventory, hardware and wiring review, assembly notes, open fit register, blank physical qualification log and file checksums.
Illustrated handoff
Walkie_One_28_7_Illustrated_Handoff.pdf
PDF · 3.5 MB
11 pages: source, parts, actual CAD views, open fits and first-article plan.
File checksum
SHA-256: cfa8b810d76eca2b9d000d61b7c665d6a3933d25552caf543682b1234d608eccNative-position parts ZIP
Walkie_One_28_7_Native_Position_Parts.zip
ZIP · 3.8 MB
13 CAD bodies with individual STEP/STL alternatives. Fit review open; read the guide before ordering.
File checksum
SHA-256: 75aec4b01dd4ef6a4cd339ca8353877860d6314f53ad0c26122999cb1954a065The parts ZIP is for prototype review. The front shell contains two overlapping bodies whose manufacturing intent must be settled. Rigid, flexible and clear material proposals are recorded; no final process recipe, G-code, hardness or finish specification is claimed.
What the fit review found
Three earlier static overlaps have cleared. The remaining interfaces still need review.
- Battery, board components and switch seat
- The 40.761 mm³ battery/rear-shell and 10.800 mm³ play-base/switch overlaps remain. A new 0.114 mm³ rear-shell/resistor contact needs local review. Cleared laminate and play-cap overlaps do not establish complete board clearance or full button travel.
- Frame, acoustic layer and rim
- The two front-shell bodies overlap. The acoustic film needs its trim and placement defined, and the rim needs a specified material and intended compression.
- Wiring and hardware
- 15 hardware and 32 wire solids are now visible, with one wire body still hidden. Their modeled contacts need classification and reconciliation; making them visible does not establish connected fit. This layout cannot inherit the 28.5 harness or screw schedule.
- Editable source health
- Five timeline entries retain missing-reference warnings. Cached geometry opens, but those references need repair and a regeneration check before treating the source as a dependable editable master.
Export reconciliation is complete: five solids in the supplied mesh set were about 5 mm higher in Y than native Fusion. The new exports use current native placement and geometry. The supplied rear-shell STL is stale; use the regenerated 07_Rear_Shell file. All 13 individual STEP files import as valid solids and all 13 STL files are watertight. Static checks do not establish motion, strength or physical qualification.
All Version 28.7 files
One dated set. Original filenames and download checksums remain available.
Complete handoff ZIP
Walkie_One_28_7_Complete_Handoff.zip
ZIP · 36.5 MB
Original source, derived CAD, documents, views, video and engineering evidence.
File checksum
SHA-256: 5038dac8b0e47c80ead08099772e134e71e6cf8a9fa1214561a754567f007b54Illustrated handoff
Walkie_One_28_7_Illustrated_Handoff.pdf
PDF · 3.5 MB
11 pages: source, parts, actual CAD views, open fits and first-article plan.
File checksum
SHA-256: cfa8b810d76eca2b9d000d61b7c665d6a3933d25552caf543682b1234d608eccNative-position parts ZIP
Walkie_One_28_7_Native_Position_Parts.zip
ZIP · 3.8 MB
13 CAD bodies with individual STEP/STL alternatives. Fit review open; read the guide before ordering.
File checksum
SHA-256: 75aec4b01dd4ef6a4cd339ca8353877860d6314f53ad0c26122999cb1954a065Native Fusion, reference STEP and viewer model
The full reference STEP contains 414 visible solids. One hidden wire body remains in original Fusion. Assemblies are for inspection, not slicing; review open fit items before using individual parts.
Original native Fusion
Walkie_One_28_1_R3_6_FULL_REFERENCE_ASSEMBLY.f3d
F3D · 19.8 MB
Unmodified supplied file; five source timeline warnings remain.
File checksum
SHA-256: f235f1a12eac953481ecccfa1f910abfcad72f830f6ece4c08f32ab37ca8fa98Walkie One 28 7 13 BODY REVIEW ASSEMBLY
Walkie_One_28_7_13_BODY_REVIEW_ASSEMBLY.step
STEP · 1.3 MB
Engineering reference, not for slicing.
File checksum
SHA-256: a662d72281f74e4a305a58f07c3e37f26e09129c7f840aa866254673f08ebb2bWalkie One 28 7 FULL REFERENCE NOT FOR SLICING
Walkie_One_28_7_FULL_REFERENCE_NOT_FOR_SLICING.step
STEP · 26.8 MB
Engineering reference, not for slicing.
File checksum
SHA-256: 833e3b76820f6f294774d5ed3f29aec07a18bf1798e0d54926acd973ed74667e3D viewer model
Walkie_One_28_7_Viewer.glb
GLB · 885 KB
Visual derivative; millimetre manufacturing geometry is in STEP/STL.
File checksum
SHA-256: e1de148dd256afc92529b4aca268f727e74c0affc38ba51952fb9bbe33fe389213 individual native-position STL files
01 Play Button
01_Play_Button.stl
STL · 103 KB
File checksum
SHA-256: 961c915c09533cd05a1d2d07eab89a83abd7733c13abca3e90a33d4df074784602 Volume Plus
02_Volume_Plus.stl
STL · 106 KB
File checksum
SHA-256: 8c70b5d1b661b9dea94c69558c8a72f83790f60f5636d5566c8bd97e4dfbf75a03 Volume Minus
03_Volume_Minus.stl
STL · 97 KB
File checksum
SHA-256: 70e157af937257337281f90a4e6130bf8b423599268012b5d25b2da309ea906f04 Talk Grip
04_Talk_Grip.stl
STL · 66 KB
File checksum
SHA-256: 67b07a3c4480f2933ac857469ab86624594d929ae83cad29cb145556dcaac24105 Optical C28 R3 4 L02 Light Guide Fit Proxy
05_Optical_C28_R3_4_L02_Light_Guide_Fit_Proxy.stl
STL · 31 KB
File checksum
SHA-256: 2c2eeb8632a0909223e5a6648ecacafda83f75200133e42df31751c0224e814106 Optical C28 R3 4 L02 Light Guide Fit Proxy 1
06_Optical_C28_R3_4_L02_Light_Guide_Fit_Proxy_1.stl
STL · 43 KB
File checksum
SHA-256: db416cfc9ad589193b99884de3377306697c1a44a7fd88729ddbda3cdb96749a07 Rear Shell
07_Rear_Shell.stl
STL · 725 KB
File checksum
SHA-256: 7e1e4cf381c99d4bac86beeb4c0cddd0aef02c217ca91cf5a9bfb44602b0d6f008 Front Shell Body1
08_Front_Shell_Body1.stl
STL · 747 KB
File checksum
SHA-256: 5ebddab204d5c4bdbd4d12fe484611eaaf2ae3ea27893db97824b7096958e4f409 Front Shell Body2
09_Front_Shell_Body2.stl
STL · 29 KB
File checksum
SHA-256: cdd5eacf8f995f7b2b622bd859de3e793e9f9feb5988e1e68c7d3a10cf578a1910 Play Switch Base
10_Play_Switch_Base.stl
STL · 48 KB
File checksum
SHA-256: 3728dfa623ca971e0ed0f028dff6d35c9f908f7d1c550f2aa32d9bdb759e850011 LED Housing
11_LED_Housing.stl
STL · 88 KB
File checksum
SHA-256: adac57c293e8f4f1994df2f8b01ef1ffa64300d2c5f74a0ea6a44ef5f09122f612 Speaker Frame
12_Speaker_Frame.stl
STL · 28 KB
File checksum
SHA-256: 93c19740232cf67c1659ed06af8030535b5cb00b62cf0ce606b39a57da83a3f513 Rim
13_Rim.stl
STL · 389 KB
File checksum
SHA-256: 28c4de06c2c77efc78cfe4d5a60c58065edb5ca879ac58135c37c0dc404331e713 individual STEP alternatives
01 Play Button
01_Play_Button.step
STEP · 70 KB
File checksum
SHA-256: 94237eeb2f9b34dc826ab67e64abf04a257926ee83a9b9361f17d93f7d80a8df02 Volume Plus
02_Volume_Plus.step
STEP · 71 KB
File checksum
SHA-256: fab35cbd928f5c7ae40b80e22e7bf3e9f3dd16bbd91aa0af82a6ed4866c10d8c03 Volume Minus
03_Volume_Minus.step
STEP · 55 KB
File checksum
SHA-256: 6c60aa2b3d7b2b279fc1abeb228328b95a77839204fd2cf6efd19edb161fa5bb04 Talk Grip
04_Talk_Grip.step
STEP · 54 KB
File checksum
SHA-256: b71f51abc1dc1081f550dd21f27e5adde712c85fdf4b21a0dbc7fc3eddd42bb705 Optical C28 R3 4 L02 Light Guide Fit Proxy
05_Optical_C28_R3_4_L02_Light_Guide_Fit_Proxy.step
STEP · 15 KB
File checksum
SHA-256: 7ee3ec828cd100eb861fd6b32955400d5498162154a8154d59a8e836f3ce5e6706 Optical C28 R3 4 L02 Light Guide Fit Proxy 1
06_Optical_C28_R3_4_L02_Light_Guide_Fit_Proxy_1.step
STEP · 9 KB
File checksum
SHA-256: 8577094ead40ce6b9bd321a23d5a41ac6de860e2192cbcf1b5bbe92dd0e79c1d07 Rear Shell
07_Rear_Shell.step
STEP · 425 KB
File checksum
SHA-256: a2724885cdc1ceea56b9080f0401117d71997b55010ba26c4207c5024860904b08 Front Shell Body1
08_Front_Shell_Body1.step
STEP · 286 KB
File checksum
SHA-256: 5d01779bac66d984d04963e88b1bc2ec5e0b41ff1e0114f292d05ddab661aa0209 Front Shell Body2
09_Front_Shell_Body2.step
STEP · 24 KB
File checksum
SHA-256: e9ce287526d48fcbf0d1a9ff6b1d0069a2fe223cf0cf671ab235cb39a5c6e6dd10 Play Switch Base
10_Play_Switch_Base.step
STEP · 36 KB
File checksum
SHA-256: 73407d7e9df7e854c8f0fda02e071750e3a61865e146ca72d05b7324f60d78e211 LED Housing
11_LED_Housing.step
STEP · 46 KB
File checksum
SHA-256: af7143b9cbece2e87443582d33aa5cee7e45cf057fc5f6d48b9e8b556f2e9cda12 Speaker Frame
12_Speaker_Frame.step
STEP · 24 KB
File checksum
SHA-256: 93bad82f3c4b2e8545ebd1b8a27b98fab8325c9b098f12f4e77bbbc5f1fe6ebe13 Rim
13_Rim.step
STEP · 183 KB
File checksum
SHA-256: a0bdb70236e1a4ff63cb24c97b7ff10085f62de64e780dbedb2dfea20fe5db73Parts, materials, assembly, wiring and test documents
00 Start Here
00_Start_Here.md
MD · 2 KB
File checksum
SHA-256: ec113bdfc48bba5dc5825d93ab9d4be373b6495549fb123a64519397ced21bc601 Assembly and Process
01_Assembly_and_Process.md
MD · 2 KB
File checksum
SHA-256: eb22e7c2d51fb1cc8de0d7792c07f7ac01144e3d8f77cd7ad80f6f3172938a9402 Hardware Wiring and Finish
02_Hardware_Wiring_and_Finish.md
MD · 2 KB
File checksum
SHA-256: 2156cdfb141d54a42d9d11231dbb4d589cb8c8438bd034391760499b8887bf9203 Native Review
03_Native_Review.md
MD · 3 KB
File checksum
SHA-256: 86c8fbb43d2fa8ffc924c5923f294e036a8b85e2f2c592b1603f6af4a898840304 Changes From 28 6
04_Changes_From_28_6.md
MD · 1 KB
File checksum
SHA-256: 2fdada25ce0d40503281efb052957e2124f2cfaf38b9ad4e865b7d6d03477e16Changes From 28 6
Changes_From_28_6.csv
CSV · 1 KB
File checksum
SHA-256: cb043c0abc33e2054906c4adee1deebacfd615176bf5e06be38b95fc2f6435a7Fit Change Register
Fit_Change_Register.csv
CSV · 2 KB
File checksum
SHA-256: d1751ef16b37bac23bcd081391b59693f4d96c31fef51478a7f1f229fc6e7004Native Intersections
Native_Intersections.csv
CSV · 4 KB
File checksum
SHA-256: 312b10e86f1694342db0cddb290226ce694ffe6c219ccf5f275aa6b0b2828b37Parts and Materials
Parts_and_Materials.csv
CSV · 3 KB
File checksum
SHA-256: 99193bbfad7b2dbff53ccd337f064492326649a59460dd881f40407853b71176Physical Qualification Log
Physical_Qualification_Log.csv
CSV · 1 KB
File checksum
SHA-256: ed75be286693b748d0b70442f7a5e478f38833165b54e8058c890a0753a98840Reference Body Inventory
Reference_Body_Inventory.csv
CSV · 425 KB
File checksum
SHA-256: 95ffa44be09d723874b5ee01792dee86be656ae075a059f781ad68c9bb0b1c91Package checksums
SHA256SUMS.txt
TXT · 7 KB
File checksum
SHA-256: 71af89b9a2ec83a59d9748cefd242328dfdb41e5adfca871d605fb6cf6b26bebNative checks and export evidence
inventory
inventory.json
JSON · 1.7 MB
File checksum
SHA-256: 6a4bf37a9bbddd5afd6769cac59585f355c65b50e21c9955536fdaec5faef11anative geometry comparison fusion
native_geometry_comparison_fusion.json
JSON · 2 KB
File checksum
SHA-256: abffffd63837a2350af2cfd2b522d29b1eb597659e4d08205a00ddbd82463865raw mesh comparison
raw_mesh_comparison.json
JSON · 4 KB
File checksum
SHA-256: 6816580e078f78c5e359b00773492be348e0668c44e1d9257e5dfe770e8ea820solid checks
solid_checks.json
JSON · 18 KB
File checksum
SHA-256: 64670408025b5d5f0829a7825700855c70d17859f5352a7470e4806bbddf6e7esolid checks including hidden
solid_checks_including_hidden.json
JSON · 18 KB
File checksum
SHA-256: 6b87ad087e6fb62ac0ea26986c6fe46cb22d14566dccbcfebf7182e68891ef24source comparison
source_comparison.json
JSON · 3 KB
File checksum
SHA-256: 227b73e9f166fa5b1a5b32cf2d40c5d23501c661d8545883c2b86699f3edbaf6export validation
export_validation.json
JSON · 8 KB
File checksum
SHA-256: 942e798206de8ae722e52093dafbc0fbd462257a1cc0e6dd9af77e685d046653native export manifest
native_export_manifest.json
JSON · 5 KB
File checksum
SHA-256: 9b16ac59f2470928621c2ad10c234fc84965d48ba595953a67a46df3e36218c0Resolve fit → Assemble → Test
The next step is a measured first article
Use the regenerated rear shell, settle the remaining geometry and material decisions, reconcile the real hardware and connections, then record the physical build. The case must seat by hand without loading the battery, bowing the board or pinching wires.
The log includes dimensional checks, control travel, USB access, 10 proposed service cycles and 1,000 proposed actuations per control, followed by electrical, acoustic, optical and RF checks. No physical test pass is claimed.
Current Golden version 28.1