Pull the tank out and reinforce (with triangle stock or at least epoxy) the area inside the nose where the fuse side meets the firewall. Re glue that whole area all around the nose, and you should be ok. Like I said mine popped out like a cork out of a bottle. Anytime I start a new assembly that's an area I always check over well before moving on. A few minutes spent checking this area can save you a lot of rebuilding time later.

Jim