The sub-composites (`e_rou_<id>_eng`, `_wep_*`) are LOCAL detail rigs: their nodes are posed in their own frame, not ship-space, so folding them in placed the engines at ~mid-ship (Z≈99) instead of aft — the "floating in air" parts. The PRIMARY composite (`e_rou_<id>`, the one with the most nodes) already carries the full ship-space layout: every hull body AND every `GN_*` hardpoint frame (GN_Bridge at the stern, GN_Engine aft, GN_ShieldG amidships…). Assemble from that one composite only; engines/bridge/shield now resolve to their real aft/mid frames. Robust to the odd single-composite case (e108's `e_rou_e108_Missile_open` is still picked as its own primary). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>