This is the drive gear holder for the brush.
The original is all plastic and wears down, making the small gear "jump" on the big drive gear. This is "modded" with 2 608ZZ bearings, same as used on the prusa printerâ¦â¦
You will need to use some needle files to get a "perfect" fit.
Have used for over 2 hours now and still workingâ¦...