I balanced mine with a fingertip right behind the top rear cabane mount. Put your finger behind the cabane, with your finger just touching it and lift, it should go nose down just a bit. Mine flew (fly's; I sold it) great at that point. Snaps and spins were great, stall was just right.

The book actually states the balance point as being just behind the leading edge of the bottom wing, and that translates to just behind the cabane on the top.

Hope this helps, you'll love the plane. It is a keeper.

Jon