So, how would a Trek 620 do for a 650b conversion? I have one that needs paint, fits 37x700 Pasella Tourguards w/out issue but tucks a little too high in my groin for my liking. The frame has canti mounts so they'd need to be lowered but that's not an issue. Would doing something like this ruin the frame? or should I try to trade it for a 58cm touring frame instead of my current 60cm? I really like the way the frame looks but with the 37s and having it "loaded" it would be difficult for me to navigate my delicates over the toptube