My thoughts exactly (replacement that is) to be honest.

As I said, I've worked out where the X,Y,Z etc go and the power but still don't quite understand how to wire up the spindle, does that require a seperate PSU as the ebay sellers are as useless as tits on a bull when it comes to answering questions, and how does one work out which wire from let's say X goes in to where on the steppers. I've tried I think every combination in to A+ A- B+ B- but can't get movement so frustration is creepin' in now