I want to have a custom rack built, much like the Specialites TA front rack, however that one's made for mounting to cantilever centerpull brake pivots. I want one that mounts to low-rider bosses lower on the fork blades. Would someone who owns one measure the following dimensions for me, please? aTdHvAaNnKcSe.

A = 45 mm
B = 145 mm
C = 102 mm
D = 61 mm
E = 44 mm

was there one designed for cantis? most i've seen were designed for MAFAC centerpulls, and i think the one in the picture is designed for MAFAC centerpulls. notice how high the pivot boss flanges are relative to the fork crown flange. the TA racks always appear larger in pictures. in reality, they're quite petit, about 50% smaller than a nitto M12... they are designed primarily to prevent bag sag, while relying on a decalleur to support most of the bag weight.

Of course, you're right. I actually want a more diminutive rack, and don't mind finding/making a bag that fits. The bike I'm outfitting has cantilever brakes; and my mind was just stuck there.
Thanks, and special thanks to qd-s for the dimensions.

I tried to fit the TA rack on Weinmann Vainqueur 999 Center Pull Brakes but brakes were about 2-3 mm too thick. So ended sawing of the rear flat tab on the TA rack with the hole which mounts onto the fork. The remaining round frame rods still bend up to hook behind the brake adding support. Hated to do this, but now they fit well and are very stable.

Also nice that this doesn't interfere with the brake mounting itself.