Brushless MT2 Questions.

[SKiTZ]

I was going to convert my Hyper 7, but it would cost to much. I have been reading these forums and especialy the MT2 conversions. Now I want one of my own. I have been looking for a good MT2 18SS roller which is really hard to find. But when I find a god roller I'm going to get it. I still don't know alot about electrics. Basicaly........I want no less than 15 minute runs. I need at least 30mph or I just wont have any fun. 45mph would be nice. I wanted to use one of the mamba max systems because of the price. I'm going to use IB 4200 batteries. I don't want to have to worry about heat. I don't need anything crazy. I'm just going to chase the dogs around the backyard when I'm bored. Later on I will go all out on this thing. Anyways.. i need some help. Thanks.