Steve,
I looked into upgrading my control box & even w/ trade in I think they
wanted something like $2,000 for the new one. I think it would be
cheaper to look for some other controller (I don't think xylotex would
handle that motor size) or try to figure out at what point that
controller is sending step & direction and jump in at that point. I
am not that technical so my theory may be total crap but it sounds
logical.