Has anyone done this before?

Linear bearing - £6




Bearing taken out, and Ballnut put in:







Now it's not quite a perfect fit because the top of the nut is slightly ~0.5mm) taller than the top of the bracket housing. So one could either fit a thin sheet on top of the bracket, or trim the top off the nut if you can figure out how to do it. Or just account for it on the plate you are mounting.

Anyway, seems better than paying ~£35 for a ballnut housing? Isn't it?