I use an EMS Jomar glitch buster to separate receiver from servo power. For the receiver, I have a little 600 mAh 4 cell up near the receiver and for the servos I have a dual redundant setup of larger 5 cell NiCads that I have mounted pretty far back in the tail on a plywood tray under the pull-pull cables. This balances things out almost perfect in my plane. I figure if I move the receiver battey back, I would go from a tad nose heavy to a tad tail heavy--it's that close. I too refuse to add ballast to a plane like this as wing loading is everything and I already have enough weight in the plane! All this talk about balance makes my head hurt. I say get the thing close using whatever balancing method you use and then go fly the thing! The card from DP that comes with the plane gives you multiple methods of fine tuning your balance in flight and there are even more techniques out there. My first flight was very tail heavy so I adjusted and found that the CG needed to be closer to 5" than 6". This was all determined in flight and then measured on the ground after I made the changes. So far I've seen the plane with a YS 140DZ, Moki 1.80, and my Brison 2.4 all manage to balance and fly well. Good luck to everyone!