I am trying to commission the BigBox Dual with the Hybrid system and the problem I'm having is that it won't Auto Home correctly. X and Y are fine but Z crashes into the nozzle and stalls the motor and I have to power down. It's because they've got the IR sensor mounted on the right side, it's not above or even near the bed at Home, it's above the plastic frame. So I can't proceed from here because all procedures involve an Auto Home sequence. There is nothing in the Guide about homing a Hybrid. Is this a design flaw or am I missing some steps ?