I finally hooked up my new Grip Heaters from Symtec last night. Thanks to some suggestions from this forum, I wired it to the speedometer light bulb power supply. Works perfectly! The heat that comes through my ProGrips is amazing! On "high", it would probably be too hot if I wasn't wearing thick gloves. I mounted the round rocker switch on the left side of the headlight fairing, kinda behind and underneath the little side flap, to keep it from being exposed to the elements. I soldered all of the connections instead of using the supplied splice, but everything installed VERY easy. I tried it this morning on the way to work and it was great. Even through my thick gloves, it was really warm. Makes me ALMOST look forward to winter.