others would know better than i, but you need adapter for 40 bucks, which im going to make my own for 3 bucks, and 2 3s 1200 to 1800 mah lipos....HK for about 20 or less, and printed support of some sort, like all my designs........i make myself, but if i sold it would be about 10, plus shipping.....i think speedy is 6.95
so maybe 40-50 bucks, but thats me, some of other guys have done it already would know better
but some are getting more than 6 minutes, and when you 6 miles out.....i mean 500 ft....LOL... you need to get home