I hesitate to mention this, being fortunate to not have an Auto Temp II myself, but, in the spirit of Supra rotors... Has anyone tried to adapt the controls from a Harrison unit [used on a certain luxury car which will remain nameless]? >From what I've seen they work great for years and years. Seems like the principle would be the same. --Roger van Hoy, '55DeSoto, '42DeSoto, '66Plymouth, '73Duster, '81 Imperial, Washougal, WA