Nice. Thanks for this post. I was just starting my 102% main gear attempt (during which I thought "should I be scaling the Z?" and after my 101% print) when I came up and read this comment while looking for the thread size. I went back down, cancelled the print and reset to these XY 1.03 settings. I have high hopes! Thanks again. -joe PS I'm still going to order an M12 tap, just in case!