i used an os .25 la. just weigh all your stuff and look for a finished weight of 26 ounces or less. i bet a .15 would be decent on this plane. the .25 makes it a rocket.

CitatioN10: what a coincidence! i got into this hobby by building a GP PT-electric. i tried to fly it alone and of cource crashed it many times. after a few crashes, i decided i had to make it glow. so i went to hobby shop and they set me up with the .25 la i have now. i converted it, but while working on covering the wings (i was new at it) i got a bad warp in one side. so it never really flew well until i fixed that. it sat for a while as i learned on foamy electrics and then i went back extra confident to fly it. i put it into a dive and pulled up very hard. my wings broke off also! it's like we followed the same book to get into this stuff.