Really...so that bolt through the chainstays is structural? that seems a good way to court disaster. Lessee, bolt breaks, chainstays fold, cranks hit road whilst rider falls over backwards into rapidly spinning wheel. Yeah, that'd be a good one. Maybe pull a few glue joints loose at the same time so you'd be surrounded with hollow flying missles. Sc**w the heart-attack. This is the way I wanna go. In front of a large crowd of scantily-clad lassies. After setting clothing on fire.