@DMD: Here's a WIP screenshot, the very crude bits are placeholders. The left figure is the basic one, the right has most of the add-on bells and whistles and some switched (alt) geometry like the different wheel hub and the different seat cushion. There's more to come, like bendy ventilator hoses etc. The fancy one also has an extra 'hinge' in the seat mechanism, where they can both tilt backwards, the fancy one can also tip forward and 'stand up', so it's a different rig. I had thought to package these separately, the basic model as a standalone, and all the rest of the stuff plus the fancy rig as an add-on kit, hence the plan to make the basic obj file necessary for the 'full house' cr2 to work. It would obviously be easier to just combine everything in one obj, but then there'd be no reason for a separate base version.