I adapted an old design of mine, so I could use the wheels for different spool sizes and diameters. Just print two wheels and the center piece you need. I provided diameters of 20mm or 42mm.
If the provided inserts don't fit the small spools you have, just adjust the central axis and make your own inserts. The hexagonal shape provides the tension needed for the spools to turn properly in the AMS.
Works like a charm in the AMS. Designed for minimal filament use.
Try it at 0.2mm layer height, 0.12 if you feel wary.