Replaces the two aluminum spacers between the hotend and cooling fan. I found the small, separate spacers to be fiddly to keep in place and after dropping one, came up with this. The two shorter standoffs on the bottom of the spacer are for 4mm thick M3 heat-set inserts. These mount the spacer onto the fan with two M3 bolts (make sure the large flat side of the spacer is against the fan). Now the spacer and fan are one assembly that is much easier to mount.

Print with PETG or similar since the lower part will be just above the heat block.