@emptw1 I'm using zmodeler, sorry I forgot to mention that. I've finished my model, and want to export it, but my zmodeler has no GTAIV option when I export. Edit: I've solved that problem, but now I'm getting an error when I export. ZModeler is ready. Error collecting export data. file:GTAIVExport.cpp line:94 Duplicate instances of part "chassis" found. file:GTAIVExport.cpp line:369