Fixed the X axis backlash problem. Because of the restricted space for the X axis nut the flange on the acetal insert has to be trimmed rather close to the 5/8 in diameter. It was flexing a bit under load so I've backed it up with another plate the same as the one that gives the compression at the other end. I now have lass than 1 thou backlash on both axes with a torque requirement of about 40 oz.in.

I'll do the same to the Y axis nut to prevent problems under cutting loads.

Russell.