Hi, I just recently assembled my 1000 x 1500 ox, and I've run into some frustration calibrating it. Specs: 1000mm X, 1500mm Y CNC Xpro controller with heatsinks and fan 24v Openbuilds power supply BlueOx mounts/ plates Single GT3 belts Dewalt 611 router 1/8" 2 flute downcut endmill Vectric Aspire The machine will be used to cut/ route .093" ABS sheets, and wood. I've adjusted the steps so that I can ask for 1000mm in the Y and it gives me 1000mm (no load). Same with the X; I ask for 800mm and I get 800mm. After that, I tried to build a small part out of acrylic, but the dimensions are all off: -Holes should be 4mm; actual measurement is 3.6/3.7mm ovals -X dimension should be 130mm, actual measurement 128.3mm -Y dimension should be 80mm, actual measurement 79.6mm -Slots have 'bulbous' ends -some holes are not where they should be at all (lower right!) -First hole cut was the lower slot - see the weird mark on the right? I cut the part several times adjusting the speeds and cutting style, but nothing seemed to work well. I'm less concerned with finish right now as I am improving the accuracy. Currently, the Y rails are only attached by their ends in the traditional OX style with Blue Ox 5x4 end plates. I suspect there might be lateral movement there, but I cannot see it. Any suggestions on what to adjust / tweak next? This part came from the space under the router head.