Hi Wayne, I'm t-12, and trying too... Looks like my fearless leader, Jeff, put you onto his website showing my log. We didn't get to the open water this year, and it's really going to be a grind getting through this winter, but next year, Look Out!
I too notice the sensation of not having a low enough center of gravity and a feeling of wanting to "tip over". As you say, it's better when your moving. I don't have all of my own personal gear yet but was thinking if i had my own tank to hose clamp a small empty cylinder on top of the tank for additional boyancy "on top" may perhaps help to stay righted. And as you say, keeping the weights front helped too.
Much to experiment with,
Rick