I need something to be able to sand a cilinder perfectly cilindrical, and the first thought I had was just to design a turntable. Sure, around is full of turntables, but this is mine, 100% home made with Fusion 360. It has a removable middle nipple cap designed to fix something onto it using a 5mm small hole in the ítem. There is also a flat middle cap provided.

There is only one wheel design provided. You need to print 8 of these. For attaching the wheels, use a number 16 wire (1.24mm diameter). As the table axis, you'll need a 2mm wire strip.

The upper roller table has that look because Octoprint's Arc Welder messed the whole thing up but since the piece was still useful I kept it. Advice: don't use Arc Welder. Use Octoprint, forget Arc Welder.

Creality

Ender 3 Pro

Printed using Octoprint.

The tables don't use rafts. The caps and wheels do use. The cap, also, requires supports.