I have alloy arms and bulkheads on the back of my Rush and all the way around on my MT Racer. I must just been lucky then as I have not bent or broke anything so far. The Rush has about 3 gallons throw it but MT Racer only has about 20 tanks but I do run a 100cc tank on my MT Racer. I flipped it about 15 times bashing today. I have heard of alloy bending but never seen it.