rstump, my Concept Fleet 1/4 scale plans show the acceptable CG range as 6-3/8" to 7-3/8" aft of the leading edge of the top wing. I'll try to upload pictures of a Concept 1/4 scale Fleet that was completed in Nov. -2008.I think it' a great kit that builds into a great scale aircraft. Mine weighs a little over 20 lbs. with a Quadra 42 for power.