The 'triceps track' has not been invented actually!!!
What I did was, take the concept that I wanted a vertical straight stroke. Then mix in the concept that in spite of the wealth of training aids 'out there' that train a straight stroke, they are a little counterintuitive in that unless you have shoulders that contribute to either a vertical or tilted stroke, then you are training an inefficient and/or contrived stroke.
So I went to the source... the shoulders! What I did was set up a straight, thin board such that I could hang my arms over the board with it touching the triceps on the outside and the pecs on the inside, and with the ability to make strokes and/or putts over it. The theory being that the upper arms should hang perfectly straight down, and if I 'run' the triceps along the board, then I move the shoulders correctly for a straight stroke without having anything contrived.