I read a post one time of someone having issues with the hardware for the holes in the rails , as there were certain sizes , and one worked better than the other with extrusion. But I think the holes are the same diameter , so I'd have to check that out . If everyone is against using 25mm guide rail , I'll certainly consider going with 20mm .
Guys , is there a recommended carriage you can buy for the Z axis that fits a 100mm spindle that is ready to be bolted up to the X axis plate? I don't really want to build that and would prefer to buy a complete one .