I am using a couple of Powerlet's wiring solutions on my Speedmaster and they are of good quality. Although I don't own any of their clothing, I've seen it all and am very impressed with the workmanship invested in the vest and gloves. These gloves look awesome and I'll have a pair soon, http://www.powerlet.com/product/heated-rp5-rider-gloves/392
And yes, they make a dual temperature controller http://www.powerlet.com/product/portable-dual-temperature-controller-powerlet-adapter-cable/98

"You're a long time underground!"