I'm not wild about the brakes set up at the extreme of reach. Maybe there's no alternative. Did you consider making a drop bracket?
No, but I've considered switching to the Dia Compe centerpulls which have a couple more millimeters of reach than the Tektros. On the other hand, since the bike is fixed gear I partially slow and stop via backpedaling so that brake caliper isn't doing all of the work.