Many thank for the welcome
The super major has a geared head and the rise and fall of the head is in the column giving a z axis range of 400mm.
I have just had an email and they are recommending stepper motors sounds good to me as they are much cheaper.
Wow that's some build awesome machining and the x and y looks the same as mine, so great for ideas.
Will do as others and do a build log with pics.
Cheers Ste64