i'm currently using shimano 105 dual pivot calipers that i'm ok happy with. But i was going thru my junk box and rediscovered a pair of shimano 600 single pivot brake calipers that look amazing in quality and looks. I decided to mount these and noticed the front caliper screw/bolt is not long enough to go completely through the carbon fork. is there a longer internal hex nut i can use? has anyone encountered this problem before?