Check the silencer isn't threatening the bellows - the original Type 3 has an insulated heat baffle over the top to stop the bellows softening, as they can then be sucked in and block the air-intake!
Thanks for the heads up dave Just checked and its about 50mm bellow the bellows, any idea if that would be ok?
I would have thought so but will keep an eye on it and if it gets to warm for comfort I'll concoct some kinda heat sheild