Welcome to the site. As you have no doubt already figured out this is a great site with great people. There is a vast store of knowledge and they are willing to share it. I have a friend who also has a problem with maintaining his balance while flying. He has his own flying site and he installed a post at the center of the circle. He holds on to it when flying. The post is not heavy enough to really support him, but he says it does steady him. Possibly a portable post might help you.
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I just bought a "like new swivel-chair with wheeeeeeels" from Boeings Surplus store for $6.00!!!
Hey Leo Mel...if you are lurking, do you remember when Tim Dunlop's son Vance...saw an old desk chair with wheels attached at the Portland Oregon's Delta Park flying site and took it out to the center of the circle, sat down...while I fired up his old Fox 35 and he flew almost the full pattern before he fell over backwards out of that chair..doing the overhead 8 and only because of a kids fast reflexes...HE SAVED THAT LITTLE STUNT MODEL by doing an improto tuck n' roll...
If I remember correctly that pretty little model that Vance flew...was designed by Lew McFarland that Vance built and took to the 68 nats in Olatha.
See the kind of OL'STUNT-GRUNT COOTS that dwell on this board.
Hey...why not stick a photo of you and Don under the scanner and pay it forward to us..
(Shultz, the don afta one.)