it really depends on what kind of 3D manuvers you will be doing i have a funtan and a twist that are set to do certing precision manuvers but i found that my fomie which i have a velcrow strip that i put along the side to move th lipo battery pack back and forth and i marked which is best for a manuver like being somewhat tailheavy is good for inverted harriers and blenders and torq rolls while parachutes and wass and lumshavocks are better being somewhat nose heavy just expariment and see what you like il post a picture of my fomi and how i set it up with ballancing.

good luck

sry for the typos