I was also doubtful when I put torque on the crank bolt. I still expect to have to install a new BB with a longer spindle. Perhaps 110mm instead of 107mm. However I did mock it up with a 53 tooth chainring just to check the clearance. It was very close, but cleared the chainstay. Perhaps the flex generated from pedaling would cause the ring or spider to make contact if I wanted to use that arrangement but the longer spindle I'm planning makes this irrelevant. The crankset I chose will make a narrow enough tread or Q factor despite the longer spindle.

Very excited about racing this machine.