This Minifigure display uses empty filament spools and Ikea Variera rotating tray.
Print two base plates per filament spool and glue them in place. For a larger display, glue multiple filament spools on top of each other.
For smooth rotation, I have used Ikea Variera “lazy Susan” rotating tray. Print one Variera insert to fix the filament spool to the tray. The insert has a loose fit (about 4 mm allowance - 2 mm all around); scale up, if you want a tighter fit.
Base plate:
Variera insert
The author remixed this model.