Needed a circle jig. My router came with an edge guide so this is designed to use those rails to adjust radius with a center screw (w/washer)

Print quality is less important so I went with a 1.0mm nozzle and .24 layers to speed things up. Bottom is smooth because of print surface which is all that matters.

Rails are roughly 105mm apart

Creality

Ender 3

No

No

.2

25

PLA is probably fine. I had petg loaded so I went with that