I have not found any base that does not require bearings so I have designed one, it is made up of two independent parts.
All you need is to print the parts and that's it.
But I have added below the platform a hole where you can tie a sewing thread and wrap it around the bottom of the platform, this will allow you to turn the platform precisely by pulling the sewing thread and not touching the base.
If you have any ideas to improve the design let me know.