I just finished the cannisterectomy on my 990 and I'm puzzling over which vent to keep in use on each tank. There are three on each side. I read the upper ones in the middle are to equalize pressure between the two sides. Since I'm planning a flappectomy, I think I can cap those ones off. This leaves two - one on the upper front of the tank and one in the middle of the inside. I'm inclined to only use the ones on the upper front of the tank, T the two sides together and run the final line up above the fuel level before dropping back down. I'm hoping to eliminate the factory issue with not being able to fill the right side all the way full for fear of fuel leaking when on the side stand. Any thoughts or experiences are appreciated.