I just did a cursory balance of my 260 with the BME 102 & a pull-pull rudder setup. The plane is nose heavy without the batteries installed. Not a lot, battery placement is going to make it spot on. It is so refreshing to get an airplane that does not need to have a lb. of lead added to the engine box to get it to balance. I fully expected it to come out tail heavy, hence the pull-pull setup. I could put one rudder servo in the tail & have it perfect, two and I would probably have to put at least one battery in front of the fuel tank. (or switch out the CF spinner for an aluminum one)