Stripped it all down today for final finish and fit, ran out of time to start the rebuild but hopefully tomorrow will get some picture update.

I was going to put the Y axis motor to the rear of the frame but it didn't play nicely and would cost me some Y traverse so I'll leave it at the front. The new idler bearings seem to have sorted the belt issues out, hopefully the motor adjustment slots will be enough to take up the slack without getting a shorter belt.

My plan is to mount the rails and screws square to the beams, its all pretty rigid and square when assembled so with a bit of luck it will all work out exactly as the drawings indicate.