I had a -6 builder look at my progress so far. I am working on getting the fuel tanks ready for proseal and he told me, Van's is notorius for having leaks at the leading edge of the tank. On the -14, this is where T-1003C meets the leading edge. The flange doesn't go all the way to the edge of the skin and sometimes the proseal doesn't always get it correctly. He said when he built his -6, it tested fine, but at around 200 hours, it started leaking and he feels that this is an issue with at least 1/2 of the RV's built. Has anyone done any modifications to this area, or heard of this problem? He said another builder added a backer plate to that rib that went up against that leading edge. Thanks.