Hi cheq - my twenty is currently at the paintshop and has had exactly that done so that when it comes out I can run some safe deore v-brakes (no disrespect but after discs and v-brakes why would anyone want to go back to calipers?)... Getting them brazed on only cost me £15 which is probably less than $25... Obviously that's part of a whole job costing more (particle blasting, priming etc)...

If you use your twenty often I'd seriously consider it. What puzzles me is how they don't fit as the original twenty rims are about the same size as 451s aren't they? my 405s are significantly smaller.

Currently deciding whether to fit some orange dahon slelvio special edition rubber when she gets back from the shop. Would certainly look cool but maybe will lose the stealth capabilities..