Well I have had two magics. One which I fly during the day has a Thunder Tiger 46 in it. The other one which I covered one half the wing clear green and the other half clear red has lights in it. I fly it at night and it has a OS 46fx. I believe the Thundertiger 46 is the best engine for the plane. The only thing I can tell you about my balance is I have the battery right behind the fuel tank and everything else is the same. I added some tail weight to make it a little tail heavy. If you go to www.flyinggriffins.org and then click Videos there is a video there of my magic.