Successful coin calibration
The slots are just a little snug, and theres definitely some under extrusion, but its not terrible for an afternoon of fine tuning.
A 3D printed afternoon
The less glamorous side of the afternoon. Curling and improper bed leveling caused some issues. Once I found the magic of purple elmer's glue stick, i had zero curling and could focus on calibrating the Z-distance.
Just for fun
A pile of failure!