Well, my stock motor is burnt out and I really dont want to argue with HL any more about it. They sent me an F-18 motor insisting that it was the same (but it is definately less powerful). Now I am buying the Don's wicked 4800 with a pentium 40. My only concern now is - How am I going to get my 2200mah Kong Power packs to balance in this thing? I'm just not sure that I can hog out enough foam for my Kongs. I really hope I dont have to buy new batteries.