If anyone is using the belt tensioners in the picture (http://www.thingiverse.com/thing:854301), I think the belt position is off by about 1.5mm. I fixed it and added a new version (1.3), but haven’t had a chance to test it yet. If you printed a set, sorry about that.
Doh! 
Good that i printed the wrong (10mm) ones anyway 
Did you update the 8mm version, too?
I know you don’t recommend that filament, but darn those parts look so good!
@Helmi Yeah, just make sure you use the files that have 8mm and v1-3 in the name. I left the older version there too for now, but I’ll remove them eventually.
@Chris_Brent Thanks! So far, the bearing holders and the z-axis clamps cracked, everything else looks fine. I’ve been able to replace the bearing holders with the same plastic by printing them flat (instead of upright) but I have a PETG set on standby, just in case.
So, yeah I wouldn’t recommend using this plastic for this part, but I’m using it anyway in the reprint 
For many other things, it’s fine, and it comes in 1kg spools now which is nice.