Well ive started the redesign so no turning back now :-) and tbh I think I will mostly be machining metals more than plastics and wood so I may as well make it right. I have changed the z axis but that may well of mucked up my plans for the 4th axis as the spindle plate and rails come down now!
I will try and get the plan finished and post it up so you can all tell me why it wont work again!
Thanks for the help and advice
Charlie