Air vent for certain GM models. Replaces Dorman 74354

This is a replacement air vent for certain GM models, like the newer Express and Savana vans. This STL file does not have movable fins, and the fit is kinda tight. So it's far from a comparable replacement for the original, but in many ways is more durable than the original which had an inner plastic that would deform over time causing the vent to fall out. I've included the RSDOC file which can be used in DesignSpark Mechanical software which has a partially complete model for movable fins. Feel free to complete.