@dc42 I like this idea!

Currently working on an idex core-xy which would have 10 steppers, 4 for x,y, 2 extruders, 2 z-axis, and 2 additional for auto bed leveling (in a non-idex configuration this would be just one more motor than a railcore). Also I like the possibility of adding tool changing or multi-material in the future. For now I can just make it work with 2 3HC expansions. Still like this possibility.