OK. After reading through this interesting debate, I am thoroughly confused. I am buying a 66.5" P51-D. I will be using a Futaba 2.4 GHz 7C radio system and I am considering a Saito FA-91S or equivalent. I currently fly with a Magnum XLS .46 and have never had a problem. I have an 11x6 master airscrew on it and it runs excellent. It even survived a heck of a crash when I lost my first plane. Very durable indeed. What do you guys suggest for the warbird? I dont mind the noise of the 2s, but I hate the mess. Help me out.