Hey JT; I'm currently building a 4* 40 myself. I'm pretty much finished with the wing and most of the fuse. It's easy to build, the pieces fit great. I'm putting a .46 fx on mine, it may be a bit over powered but i think we'll be O.K. As for beefing it up I was tempted to sheet the the wings forward of the spar but eveyone assures me me that it's not necessary. Good luck I hope You enjoy Your first kit. BKF.