3004's should do fine. The only other thing I can really nit pick on mine was the rods for the ailerons. I put them in my z bend pliers and they just snapped, both sides. But I was able to grab the ones off my Avistar, and shorten them a little and they worked fine. I have a Pitts muffler comming in on Friday for my OS 46 AX. I am getting really excited about flying this beauty.