Im not sure whether to fit this or not, is anyone running one without any problems? or is there any way to stop it destroying the oil seal?
Just be really careful, it needs to be done by mechanically turning it, you can't do it by hand, apart from it taking forever you'll run the risk of making small flat spots which will make it worse......I've got one for sale that never destroyed the seal. Mine was scratched when it arrived from Forge and was the last on they had so, (once i got my money back:-D) i put mine in my lathe and polished off the anodising with a scotch pad and then mirror polished the arbour (the bit that touches the seal), i also read somewhere else that had a good result doing the same thing. So I think it's the matt anodising process on the pulley that kills the seal.