i'm having trouble figuring out the best technique to balance my ultimate. the instruction give the balance point on the lower wing, but whats the best way to do it? your suppose to balance a high wing plane upside down because it's top heavy, but when you turn a biplane upside down the upper wing is in the way of using a cg machine. i guess i could just use my fingers but thats kind of unsteady with a 9lb plane. how would you experts do it. Thanks