I can tell you what 40+ years of manf. suggested, starting, or beginning CG positions have taught me. They are very nearly ALWAYS WAY FAR AHEAD of where even a sport flyer will end up!

Also, nearly all of the China built models are safe to fly the maiden if the CG is somewhere near the leading edge to the middle of the wing tube. This nearly always puts you somewhere in that 25-33% of chord range - right where most builders will recommend you start. My opinion, FWIW. -Al