My tip on the crossover tube between the tanks......that area will not ever been seen again once you put your tank covers in place and both sides of the aluminum are open to the engine bay, so there's no real reason for that area to be "sealed" at all, and if you cut the holes precisely so the crossover tube fits just right, it will be a real PITA to install and remove the tanks if you ever need to. There is no compliance in an AN hose that big and that short.....so creating some extra clearance in that aluminum panel is going to be a good thing.