Joe: The top sheeting is removed between the leading edge and the spar. The Dubro S-14 tanks sit on a light ply floor that ties the firewall, wing leading edge, and nacelle sides to the spars. And there is still 1/2" clearance on all 6 sides of the tank for foam padding. That is the way the original Super Sportster Twin was done and it is VERY strong.

Kelly: I agree, sheeting the turtle deck would be smoother, but I wanted to keep the Super Sportster look and that stringered turtle deck is a big part of it.

Jim