Short answer…no. 🙂
Long answer…I think you may be right. One of my stepper plugs is kinda fubar. It looks like the underside panel fell off or something, and one of the little connectors in the plug SEEMS to be slid down a little. I was hoping the fingers on the wiring kit from here were long enough to make contact.
I think I’m going to rewire via the solderless connection on all motors to see if that changes anything.