I agree rubber bands are a pain, but those nylon bolts are not much better. My planes have made several attempts at going underground and so far not one nylon wing bolt has done what it is supposed to do - that is break! Instead the bolt mounting blocks get ripped out along with several pounds of fuse. The wing still gets damaged. They are sure not designed to break, if they were they would. A guy yesterday put a spitfire into the ground on take off (tip stall) and half the fuse ripped out but the bolts were still solid.