Multiple possible solutions are becoming apparent
my main issue with travel agent, is in initial test attempts, the cable at the tightest loop on the small pulley keeps wanting to pop out. (ie, it does Not like to be bent that tight)
considering modification of pulley to add a guard so that when this does happen, it just falls back into place under cable tension.... -big washer bolted on top
also, found a seatclamp cable hanger online that appears possibly as much as 1cm shorter than what i had
http://www.google.com/products/catal...77144792875188
this might buy just enough room for cantilever brakes' straddle wire
need to order one and find out
still wondering if anyone knows about a seattube mounted S-tube that can be clamped on
-think of old mtbs from the 80s; they had a tube brazed to the seattube so toptube brake cable can go around