I just got a new Reynolds Ousa Pro carbon fiber fork. My Ultegra (BR-6500) brake mounting bolt is too short, it measures 14mm w/o the washer. I went to my LBS and got the longest sleeve nut they had (27mm) and it is still too short. The width of the fork is 43mm and is only slightly countersunk on the front side +/- 1 or 2mm. Any suggestions?? Thanks in advance for your help.