Thank you Brady! I will take a hard look at the gear before I go any further. My z has been pretty much on point with depth, etc so I wasn't experiencing any issues. Since I had ordered all 4 gears I figured I'd replace but I can do it a bit later I suppose. The machine gets used at most maybe 3-4 hours a week with hobby use. Most of the time it's just running a small project for a few cuts each weekend. I have yet to do any 3d work.