Here we go again . . . MK4

[Zeeflyboy]

re tightening the retaining nuts, you can also dremel a little flat head screwdriver slot into the end of the ballscrew shaft and use that to hold the shaft still while tightening the nut.

Well I say "you can", I've never seen anyone else do it but it soother's probably a really great reason why not to, but it works for me! No more worries about damaging the important part of the screw vs not tightening it well enough.