Need some help from you pro bros. Gp 540 Extreme my first profile and Ihave a bad cg problem. Standard servo's in rear, 46 Tower all the way to the front of the beam and I still need alot of weight in the front to get ballance. What did Ido wrong? Anyone else have this prob. Calls for standard servo's in rear, minimal epox on tailfeathers, batt and receiver are on spar. I think I could put a 75 ST on this thing and still be tailheavy. What is going on. Please help