In this video, composer Edmund Eagan shares his approach to implementing a Touche control with the Haken Audio ContinuuMini.
Using a Touche lets you split your performance across two hands, which can make it easier to control and articulate sounds with fine expressive control.
Great job! I offered a similar suggestion to the Touche folks once to simply put the Touche under a midi controller. Then you could rock and push on the keyboard and generate the 3 dimensions of movement. A small controller would be easy but even a larger one should work perhaps with some mod to make it more suited for handling the weight and width of a full size keyboard.