Norm, you're 100% correct, with what I suspect is the proper belt there's a lot of room for the tensioner arm to travel - when I put the M36 on this was obvious straight away and I immediately suspected it was completely incorrect.
I've never looked into drive belts so much before and they're a tricky little area indeed. Hopefully the Gates belt which is around a M36.5 equivalent will do the job. :-)
