This surprises me. I'd not be surprised when people convert "other purpose" bikes to SS and try to make a track crank fit. Or guys like me who replace ashtabula cranks on wide tire frames, you'd expect to have some issues to deal with. It just seems like "Track frame" makers AND "track crank" makers would design their products to specs that would eliminate the chance of lost sales. Not necessarily an official industry standard, just with some fudge factor built in. Weird.