Oo, this is a handy forum post! I just done a new carving… First hour everything worked perfect! Carve looks great… 10 min later I started a new carve, my machine lost steps. I’ve encountered this problem before, when there is “to much” dust on the rails,it shifted a mm or so. But, if I see your x carve, it’s even more dusty then mine! So, maybe I did something wrong… Aah well, I’ll use your videos as a guidance 
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