The parts glue together and the units can be stacked.
Enjoy. I hope someone gets some use from it :)
Main Rack, (self supporting car rack)
Glue the Car_stand_Top_latest to the top of "Car_stand_base Latest
Extension part. (Rack extension, not self supporting)
Car_stand_extension, Sits between two "main rack" assemblies
Car stand end. (rack extension with one side supported, use mirror tool to orientate to desired orientation
Glue the 2 beam mounts to the top, then glue to the base.
*note, Does not require supports
*note, at 15% infill its very dependant on the rear supports so it doesn't warp, I recommend printing at a higher infill percentage and allow it to fully cool before removing it from the head bed