I took an idea from another builders site on attaching the NACA scoops to the fuselage.. Basiclly there is no way to clamp these in place while the tank sealant dries. I cut 8 backing plates 1/8" .025 thick to hold the scoops with blind rivets in place while the tank sealant dries. This will also create a tight seal when the sealant dries. All in all I think its a pretty slick way to install these.