I made my own clutch switch, had a switch used for a backup alarm that is activitated by the shifter. For operating the switch the arm is about 3 inches long and a spring. Made a bracket that mounted the switch arm so that is is on when the clutch petal is out, and off when the clutch petal is in just a little bit. If I let my foot ride the clutch petal, the switch is off. I wired this in the PacBrake switch circuit so it breakes the ground when in. I added the switch because the "hiss" when shifting was driving me crazy.