Something I forgot to share that I did when I built the chassis that was something a friend who works on Speed Demon told me to do. On all my tubing where EVERY ONE OF THEM intersect, I drilled an 1/8" hole (that was fun trying to remember even with tape and Sharpie notes reminding me!) so all the tubing is literally connected. On my very back tube, it's plugged with a thicker piece of steel with an 1/8" pipe hole in it for a shrader valve. When I get back from an event, I'll put around 5 lbs of nitrogen or some other "dry" air and watch the gauge. If it doesn't move, no frame cracks but if it does, put more air inside and walk around with a bottle full of soapy water and look for bubbles! Brilliant idea, cheap insurance and simple to do!