Interesting write up on the tank repair. I've sealed tanks on two different airplanes, but didn't cut the tanks open to do it. The one had aluminum tanks, and they did seal up, but eventually they did start to leak again. I don't know what happened to the other one, as I sold the plane, and never heard anything negative from the new owner. It was good while I had it though. That being said, I would do it again if need be. I took the wings off, and used my wing rotators so I could roll the wings around to get everything coated inside the tanks. I used KBS coatings and would do it again. JImChuk