Today I managed to get the cooling duct fitted & clecoed in the cowl bottom, but it is VERY close to the tappet cover on cylinder #4, less than1/8" in one spot. I don't know how far the engine moves on it's mount, but it would not have to go far to foul & perhaps wear away the duct. Should I worry?, - has anyone had a similar situation? Thanks for any thoughts, ....Cheers, DEAN..