Roger, My poly header tank had a very small fuel leak on one of the threaded fitting joints. I used the recommended Permatex 9A sealant to seal the threads, it worked good for a couple months then I re-sealed the fitting with the same sealant with no problems since....have 85 hours logged now. The poly threads can be hard to seal and I know others in this group have had issues with this. As of now I have no fuel oder in my Fox.😄
Dan