I have looked at profiles but right now I want to stay witha built up plane.I am gathering a 10.5 or say 11 pound airframe with low wing loading is ideal but this isnt a perfect hobby either..I just think 13 pounds will mean that it wont have unlimited vertical for the big wow manuvers and likely will struggle to go straight up out of a hover.I am spoiled with my 3dhobby planes but the 30cc market really has me wanting to do gas again..