Clay,

I just compared your Magnum to my OS LA 65 and you are 3.5 oz heavier! I did use a balancer at the 105mm and thought I was right on with the battery to the rear of the servo tray...wrong which is what I found on the first attempted take off but managed to save it. It's very difficult to advise you or anyone on these threads because of the variables, battery size's , rx's etc. I can only tell you my experiance and that's why I say, get some other opinions when you have the plane there in front of them. Good luck!

JOHN