By using two of plate.stl, one separator.stl and 15 pcs balls (6mm) you can make simple turntable stand. It can be used for cooking, making cakes, filming and photography.
Diameter of plate = 140 mm.
it is used by placing under a dish with cake and then rotating it all together. If dish is sliding on turntable you can place some rubber pads on top and bottom of turntable.
For smooth operation I recommend lightly proccess ball tracks with sandpaper before assembling, and after assembling rotate couple times turntable under load of ~5 kg to smooth the tracks