I am in the middle of a build with a nice Dura Ace EX group (bought used, thankyou very much) and the brake calipers are set up for recessed allen but my frame is for full length nut exposed. Please do not suggest frame drilling! I need a full length front caliper center bolt or a caliper for parts. I will even buy a mint Dura Ace EX brakeset with full length bolts, for I am also putting a spare groupset together for the future. (I am also in search of a minty early old style DA 170 crankset and BB to go with a Crane era DA set. Thanks from Patrick Lay in Chicago