Just picked up a set of shimano 600 tubular wheels for a song. they're going on my ss cross bike. the question is, can i use the QR on the rear? i run my wheel all the way back in the horizontal dropouts. if the skewer won't work, can i use a bolt-on allen key style one and still keep it relativly secure, or am i going to id the wheel out of the frame when i crank it?