This is a small and light rocket, BT-55 tube about the size of the Estes Goblin. I launched it with B6 motor and a large streamer, it fell on soft grass. The design has the motor tube hitting first. I put really big Titebond fillets on my models, and it still broke off a fin. You can see that the fillet spread out to almost 5/8" wide and has to pull that much tube off to fail, but apparently somehow it achieved the strength of paper. I'm going to clean off the fuzzies and glue it back on with some epoxy to give the glue a bit of a chance to soak in. At least it will fly again.