It would be useful to have different parts, that could interfere, have either one or the other be selectable at a time. The only current issue is the garbage can and the tow hitch on the pigeon, which causes the following:
Yeah, we'd need some kind of co-exclusion list for incompatible parts. Not sure how doable that is or if it's worthwhile. There are some other conflicts too, like installing the D15 push bar with the off-road bumper.