Preserved native Blender assembly: 24 R2 shell meshes plus 13 PC1 candidate pieces. Units mm, scene metric scale 0.001. This is editable assembled geometry, not a one-piece print. All physical fit/load/cooling/acoustic tests remain NOT RUN. Use the BC1 CAD/STL companion package for individual print-oriented meshes, quantities, source code and measured-fit gates. The file and geometry remain byte-identical to the prior PC1 native scene.
