Hey, I've got an extra generator for the 13-15. Powers 2 Warmers guaranteed, never tried 3, but it would probably do it. 3500w with 4 plugs - it's pretty quiet at 71db, but we throw it behind the car, and it deflects the sound. Runs about 4-5 gallons of gas, max for 2 sets continuous. I'll also have 1 extra space on my generator the 14/15 for Races. I also have a few extra sets of warmers if anyone needs any. 2 Chicken Hawk Sets, -1 triple temp, 1 single temp. 1 Moto D Dual temp set. 1 no-name set, but they work great. Let me know if you need anything!