I plan to have few components of 6061 plate in a fender assembly of 3003 sheet. I'll be using 1100 filler on the 3003-3003 seams and 5356 filler on the 3003 to 6061 seams. There will likely be some 3003-3003 seams that lap on to the 6061. Any concerns about areas where the 5356 filler and 1100 filler come together?