I'm going to say you probably saved the fuse and some of your radio gear by hanging it by the tail. If the tank leaks, it's going to do so more when it's full and under muffler pressure than it will in storage with a trace of fuel in the tank. So the fuel collected in the tank area during your flights would have made its way to the rest of the fuse, if it had been hung by the nose.

Just food for thought.