I have the firestorm 10t, converted it to brushless with turnigy trackstar combo, I got the highest kv available, the esc is 80a, so far everything runs sweet, and the temperatures are very good, I got the waterproof model so the programme card didnt work I had to buy the programme box, dont know if it was a one off or set like this from stock but it was very sluggish running from standing, then it would kick in and go, thought it had bad cogging until I got the programme box and found that the top speed and punch are set very low. Once this was changed it ran perfectly on a 2s, will be getting 3s soon so cant comment on that just yet. Overall very pleased with the combo and plenty of speed for the firestorm, and at a good price. I got mine from the uk, a very good ebay shop called rcstockroom2012, very helpful and very quick delivery Edited September 29, 2013 by trickstar.