Thanks BB
Was half way through taking the engine off When I realised I hadn't taken any photos.
I'll let you know how I go tomorrow.
Any ideas re the drive clutch behind the big sprocket and how to adjust same? I undid the bolt through the centre of it and now don't have any drive.
Also still have the issue with motor alignment on the twin rail. There seems to be no way to adjust the alignment.
Cheers mark