I have lost two mufflers and a fuel tank in flight before. The first muffler fell off os 46 fx as the plane was at the top of a hammerhead stall. The engine stalled and the plane tumbled dead stick to the ground, surprisingly only about 10 minutes work to replace the damaged components but the replacement of the muffler took longer. the next muffler I had fell off of a ys63 as it was passing by me. It landed 30 feet in front of me on the runway. Unfortuneatly when the muffler fell off it weakened and wreaked the diaphram on the fuel regulator, oh well time to replace the diaphram. Latter on the fuel tank fell off my plane in midflight on a low pass. the joys of profile aircraft. now there was some embarassment and a need to find someone who had elastic bands