This is a stand made for holding and rotating models while painting.

The tops have a slot for a 1/4 in by 1/8 in magnet to hold the model and a slot for a standard skateboard bearing (8 x 22 x 7 mm (608-2RS)) on the bottom for smooth turning. I used an interference fitting to connect the bearing to the bottom plate with 3/8 inch wood dowels. I've included an assembly peg model that can be printed to replace the wood. The herringbone gears have left-hand and right-hand configurations. You'll need to print 4 of each.