I'm sure I read about this somewhere, but haven't had any luck searching for the answer now... my tanks sit with the top surface just about the thickness of a wing rib cap-strip down from the level of the top surface of the ribs. Is it necessary to fill the top surface area of the tanks with something like Super-Fil so that they are level with the top of the ribs before covering? Will the fabric shrink down & touch the tanks with that much of a gap, if I don't do that? Also, I'm wondering if that will present a problem with the trailing edge of the Laker leading edge if the surface of the tank doesn't touch & support it initially.