Calibration /accuracy / fusion 360

Ok I’m at a loss… I’m having problems wit accuracy of some parts I drew and generated g code in fusion 360. The holes keep coming out slightly elongated and the part is about 1/8" too large. I tried using UGS and the YouTube video on how to calibrate the axes but it still comes out wrong. Any ideas??? The parts are drawn in inches, but I can’t imagine that makes a difference.

Try cutting something in easel… Also try adjusting your axis potentiometers a little More

Also belt tensions, V-wheels (tight or loose), and pulley set-screws.