ORIGINAL: BobHH
Stan, The original plans state 3-1/2 to 4 inches from the leading edge. I have found that 3-1/2 to 3-3/4 works fine.
Bob Harris
------------------
Just multiply the wing's chord (the distance from the front of the leading edge to the rear of the trailing edge) by .3 and that will yield the balance point position as measured back from the leading edge.
Ed Cregger