well converts I bought the nitro planes 120 ultimate bipe, is very light and I am going to put a 25cc weadeater ultra which I modified the timing duration for both the admission and exhaust, before the hop up I was getting 8100 rpm on a MA 15x8 so I think that with the longer duration(135 for admission and 150 for exhaust) I'll be getting higher rpm's but I think that's going to be a great combination I will let you know later about the results once I buy the radio gear necesary to complete.