For anyone building a BigBox version 1.1 (any configuration): Just a note that the build manual instructs people how to take the improperly prepared stepper motor wires and connect them up to the RUMBA. However, it seems that E3D has corrected the improper preparation of these wires in version 1.1...sort of. They are now properly paired and twisted, but they've also added a 4-position connector housing to the other end. This would be great, except that there are 2 Z-Motors and only 1 set of male headers to plug them into. So, here's what I did to make this work anyway. I chopped off the end of one of the 4-wire assemblies just before the 4-position connector housing, then stripped and tinned the ends of the wires. This one then got screwed into the terminals while the other got to use the (more convenient) 4-position header. Attached is a picture. The printer isn't fully built yet, so I can't confirm 100% that this works, but I don't see any reason that it wouldn't. Picture attached.