Andrew's technique looks good (thanks!) and I'll "borrow" it for the Senior Y axis. The rolled screws I've laid hands on (German, via a UK company) seem to be burr free, judging by clocking the raceways with it held in the collet. BTW the cylindrical non-threaded nuts supplied by this firm (they are ISEL nuts) have a backlash adjustment system built in. All it needs is a 6mm or similar grub screw. |