Straight cut 45mm length (for 4mm outer diameter) PTFE jig to assist my nozzle changing Qidi X-Plus and X-Max stock normal (low temp) extruder brethren. Some older X-Max's use 36mm tubes, so I just posted that version so nobody misses the helpful train.

5mm square bore to minimize bending (facilitating a square cut) if tubing is curved from packaging/storage.
45mm from butt end to center of cut line.
butt face (haha) has slot to push out tube if curve makes it stuck.
Cut slot 1mm lower than bore bed for clean slice through tube
Tested cut tube for 20 hours of printing. No blob leaks

Side engraved with cut length for easy ID in case you have multiple models printers

No supports needed. Recommend slower speed (45mm/s?) as it's so small