
Nice and simple. Checked the models, inner diameter is 0.2mm oversize which on a calibrated printer will result in 0.2mm oversize rings. That's however so little that it won't matter.
Printed on a mini+ with cheap PLA, turned out very good.
Made them a bit thinner. Also check the inner dimension after printing, it can vary.
Simple print, you can print all of them in under an hour.
Great for figuring out size.