I’ve been rebuilding my mpcnc this week to a slightly smaller size and going over it all to give it some maintenance. I’ve always had play in my x,y,z axis but figured it was a pitfall of the PLA conduit nature of the machine. I just reprinted some parts at 99% scale to test and it’s eliminated all the play, all bearings engaged!
I bought screwfix 25mm conduit in the UK, not great but served me okay I guess.
Unfortunately after this dicoverery i’m now reprinted all the parts involving bearings…
Hope this helps someone, also print one bearing part and check against your tubings!