I feel that the circle could be rounder by tweaking size and damping just a bit more. But like you mention it is a balancing act and trying harder can throw you of balance and it will take a real effort to get back to the sweat spot you were just a minute ago. So i chose to stick with this for now.
I guess it is time to show off my conversion software thensee the attached.
Both are a bit of a fast job to be displayed at 30K. Hope you can load format 3 otherwise the colors will be off because it uses a non-standard palette (hardcoded for now).
Well laseroids got me started retuning because the asteroids shapes didn't open right. Now they do!
Again thanks, Adam, for that write up.
Z.