Hey fellas. I am converting a bike to a fixie, and thought up a very unique idea. I want to make a handbrake for it that is mounted on the top tube and controls the back brake. I was wanting something that would lay parallel with the top tube when the brake was not being used. I was thinking about modding one of these down tube shifters by mounting them to the top tube, and somehow extending the "arms" and have them merge into a single arm. Could you guys help me out with designing this?
P.S. I am planning on making the two cables merge into one and making it a U brake.
***EDIT*** I forgot to say that I want it so that when you pull it back, it activates the brake as if the brake lever were on the handlebars.