First alternative parts from me are as follows: Wiper I didn't have the right size brushes to fit the wiper part, so revert to a silicone wiper. This is designed to accept push-fit threaded inserts for M3 threads: https://uk.rs-online.com/web/p/threaded-inserts/0278534/ The holes go 25mm inside, so you could use a pretty long screw, but the ones supplied fit fine. I ended up using a nylon standoff. I sized the hole for an M6 grub I had lying around. I don't think the grub is totally necessary. Also, I had intended for the silicone to be more embedded than it is, but it works as is. This was just a miscalculation. I don't want to get involved in you mashing your machine, so I'll just give the movement coordinates part and leave you to damage your machine alone. Code: ;wipe G0 X-38 Y149 F6000 G0 X-20 Y149 G0 X-38 Y139 G0 X-20 Y139 G0 X-38 Y149 G0 X-20 Y149 F50000 Dock Cables I mangled the thread when I tapped it and the grub wouldn't hold the metal strengthener in place. So, as I have a bag of threaded inserts: Push an insert flush, then wind the grub in. This gives a super solid hold. In theory, if you've mangled the hole like I have you could just ream it to 4mm and then push an insert.