if at first you don't succeed...

Problem No.3 - George turned down my rear wheel spacer 55thou (1.4mm) and the rear wheels in - perfect fit.

Problem No.6 - Crankshaft nut removal, George said to hit it head on with a copper hammer and it will break the adhesion. Paul came round with a 38mm socket and suggested hitting it sharply in the undo direction. I used both suggestions, and its off! no impact driver required.

Problem No.5 - It appears that the solution is to take metal off the gearbox plate so the box sits lower for alignment to the inner primary (which I had done a little already), but crucially the trans shaft support bearing needs to be fitted to achieve exact positioning.
Solving this last problem will mean I can finally button everything up and move on.
In last weeks black hole it really did seem as though Christine was never to be on the road...