A build123d assembly exported STEP with every product named ASSEMBLY or SOLID, so the downstream drawing editor could not list parts. Each CNC part, spacer and stock screw now gets a label; a full prototype build with real threads still segfaults in a boolean inside the thread code.
From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.