The next step for me in the preheat process was a way to control the activation from home, so I wouldn't have to drive to the hangar to set the timer or plug in the heat then come back 2 hours later to fly. After some research , I found that most manufactured cell call activated units run $200-300 . Being the true homebuilder (read cheap) that I am , I figured there was a more economical way. So with a bit of further interneting I just finished a homebuilt unit for 60 bucks or so. I found a Romanian Helicopter pilot who builds a cell phone activated (the light on the screen of the cellphone does the activation) relay switch for 25 bucks shipped to my door. I had an old cellphone that I bought a new sim card and 3 mos of prepaid minutes for another 20 bucks ($10 for the sim card and $10 for the 3 mos of mins so about $3 per month for cell service). A trip to lowes for a elec box to put the relay switch and plug in for a few more bucks and I was good to go.I just installed this at the hangar and testing has just begun. If it works OK , i will take photos with more details in a future update. Bruce N199CL