Thanks for the explanation Jazz, learning all the time. First off I have to absolve CNC4YOU of any blame. I watched a lot of videos of builds, then dived in and bought stuff myself. Nothing recommended by them. Fools rush in etc!
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All my motors, NEMA34 included, are 8 wire, wired in parallel. At least I got that bit right then! Lol.
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As you suggest I'm going to fit it and see what happens. If it doesn't work then more voltage will be fired at it.

I'm hoping to have it running in a couple of weeks so will be interesting to see what it can do. The columns rigid at least as that's bolted at the top to the enclosure frame.
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Thanks for the advice. Appreciated.