I just installed a set of Tektro 720's on my 'cross bike. I tightened the straddle cable carrier bolt, tightened up the straddle cable, and made sure things were centered via the spring adjusters.

I then tightened up the two 2.5mm allens to hold the straddle cable in position. the brakes work great. However, I am unable to unhook the straddle cable (there is not enough play in it) to release the brakes. I'm sure there is an easy fix.

Any ideas?