Seven validated STEP files (Rat Rig V-slot 2020/2040, T-slot 4040,
C-beam 40x80 under CC BY-NC-SA, official Victron Cerbo/MPPT/
MultiPlus-II as closest proxy) with checksums and licences; failures
and alternatives recorded (Fronius, Pylontech, OpenBuilds plates
behind logins, no free Karosa mesh). Dodo and Fasteners addons
documented at pinned commits with the macOS install path — install
left to human review per the supply-chain policy. Native FEM/ccx and
Assembly confirmed sufficient for cantilever, sliding kinematics and
centre-of-gravity studies.
L'électron rare