Be aware that if you want to control trim with buttons on the grip you may need to
change the wiring a bit since those buttons typically can't handle the current needed
to drive the trim servo motor. Also note that the trim motor direction is determined
by the input voltage polarity so operation with 2 switches requires some additional
circuitry. It's also more difficult to have both the Kitfox-supplied switch and grip buttons
at the same time.

If you need more details on how to wire it up just let me know here and I'll post
the info on my setup which uses the Ray-Allen grips, Garmin autopilot servos and the
TCW Safety Trim Booster.

Victor