The Brodak plans for the full size Flightstreak show the CG right behind the leading edge spar. I have George Aldrich's proof copy. I have seen one of George's plans with the CG above the spar. It is partially erased and George wrote "wrong". Another CG is drawn in as on the Brodak plan. Oddly enough, the CG on the Jr. Flitestreak is back more. I balanced my Jr Flitestreak about 3/8 forward of the plan CG and was very happy with it. It flew the pattern very well. I would not attempt to fly a large Flitestreak balanced on the spar. I wouldn't be able to control it.