That's helpful information about the tool changer. For the time being I'm only doing the one pass, since I'm only going up to .5 inch depth. And I'm using between 64 and 128 steps per inch which actually just shaves a little at a time. You see I'm basically trying to get my machine to work much like my Carvewright machine. Same bit, same back and forth raster carving. So far it's been doing pretty good. I'm not able to get the speed that I would like but it's almost as fast. And it's not missing any steps.