Great work Greg, 
Interesting that you say that the drive belt height could be out.  Its had a new motor at some stage.
The blades turn great.  Hoping my money clear through paypal tomorrow so I can get access to the manuals.  After seeing yours I am keen as mustard to give it a go.
Mine is the red/orange with white wheels.  It still has all the stickers on it.
Out of interest how does yours perform?