Originally Posted by BIG RE

I will pass this along to Mike for you. ARTR's aren't a bad idea. I have just joined the Caster Team for 2010, but from what I have read I believe they used to offer a nitro combo with the kit and motor. The grenade engine has been discontinued, but the replacement should be coming soon hopefully. I would imagine that the combo type deal would be offered again in the future, for nitro at least.