Well, this is a beginner forum after all! I foolishly made the assumption the the OP would want the simpiest, get it in the air and not sweat the small stuff answer!
ORIGINAL: Crashem
There is nothing wrong with putting lots of weight towards the tail of the plane, as long as it is secure and everything balances correctly.
If you don't mind having a plane that is much heavier then originally designed i.e. higher wing loading.
I would try to shift the servos and or rx and battery around. Also look at a light weight spinner nut and light wheit wheels especially for the nose gear.
Don't take this the wrong way I have the CG machine also and the rulers are metric on one side and standard on the other any chance you are using the wrong side for measurement??