Hi Boyan,

Machine like that is full of problems and the more you think the more you will want to smash it.
Oh YES! You have no idea how much sometimes...

I've replaced the brass bushing on the Z axis with bushings from Igus (igus.co.uk): they seem to be a tighter fit than the ones that came with the mill. This should improve some things.

Off on eBay/Amazon now to find fitting ER11 chucks...

Bart