Hiya, my 2 cents. If you have a well tuned machine (which i assume you do):

• Extrusion widths that are up to 50% larger than your nozzle diameter are beneficial, because the brim of your nozzle flattens the material against the lower layer
• Printing many keycaps at once can help the stem cool completely between layers, if heat is a problem
• Have you tuned pressure advance after swapping nozzles?

Yuck! Have you taken some calipers to it to check it's diameter?

Hi, have you managed to fix this? My 2cts would be to do a flow calibration, and verify what size nozzle youre using (though this looks rather extreme to be a flow rate error).

For science! I'll be ordering a spool from amazon. Heard about the material from the "Lost in Tech" yt channel, was effectively looking for a less fussy nylon-cf.

Oh dear, noted. Think i'll layer some gluestick on my buildplate as a cheap releaser