IDK which canti's you have, one popular adjustment improvement,
is added to where the fixed end of the cable is,
to replace the standard fixed transverse cable
with an adjuster between the end ball and the brake,

Avid Ultimate http://www.cyclocrossworld.com/avid-...locross-brakes
and some of the TRP EuroX cantilevers come with those
http://www.cyclocrossworld.com/trp-a...e-brake-barrel..

you might go for Pauls new short arm V brake too.
they are made for cross bikes with Road Brifters [in California] http://www.paulcomp.com/