Oh man Sparky! Coreman is getting ready to debut them this weekend! you could be the first ones to get them! It's best to check www.racores.com to see the updates but I'm sure when come out of the Coreman area 51 / skunkworks he will respond! I used an eflite 400 with a 8x7 nitro prop on a proto and it moved out pretty good ( 3 cell) With all the stuff available in that size you will hear a bunch of different combo's that work good.