Well, got my finger out today and made up a simple little bracket, mounted the VR and will run it sat there for a good run tomorrow 60 or so miles, and will see if its has A move, B been rubbed, C got ripped off and is on the road somewhere!
i started it up and the belt didnt come close, all edges were smoothed to help matters on the bracket. if it works i'll paint it and sort a neater bolt for it.
the pulley wheel is great, no run out and spins true, the dynamo pulley on the other hand doesnt.... might try and find a proper VW one (if this one isnt) to see if thats any better.
anyway, enough chat, pictures!
Held some wire wool on the pulley to clean it a little too, straight on view
side view of ally bracket
clearance
VR clearance
cheers