Mike,

I had the same problem on my Kingcat, when I de-fueled, the Jersey modeler would collapse my center tank, causing it finally to leak and I had a flame out. This also happened to a fellow modeler here in MN. I talked to Dave at BVM and he said they just don't empty the tanks unless they are going to store the Jet for a long period of time.

What I did was install a more rigid center tank, similar to the UAT, just larger. This helped the problem, but now I just leave the fuel in the plane.

I also had the problem of the tank filling to quickly and swelling the tanks in my F-15, so I removed one cell from the JM.

Hope this helps,

Kevin