Ok on that. That does sound like a good way to setup a new plane. I went ahead and flew this plane with the CG at 80mm behind the leading edge of the wing. It flys pretty stable now with just a little increase in lift when going to full throttle and can fly level with a few clicks of elevator. At low to no throttle it still has a very good glide. Changing the CG from 90 to 80 did make a difference and I like it for now. This test was with hardly any wind blowing today. The plane does have built in some down thrust in the firewall. Its not a really fast areobatic plane with the .46 O.S. No problem doing a loop and basic manuvers. A 55 O.S. would seem a little more needed.