Saw a Z-Axis cover and wanted to adapt a design for a bigger knob and using the press-fit magnets I used on my other covers. I printed it at 0.3mm layer height with PLA, 10% infill. Then just place the magnet, use a c-clamp to pop it in. It's a tighter fit than I thought it would be, but works well.
I printed one thing at a time for best results.