This forum has helped a lot (especially bill with his Inchworm help!), and I have to say it was a thrill to build/troubleshoot this. Building this was like working with lego's, but.. better!
I know its not perfect yet, I need to spend more time tuning it so it doesn't spin as much.. but I think 99% done is worth showing off. I'm going to post a bunch of pictures/info later, but I wanted to share while I was still high on success!
Neat. I like how you stuck it with wheels on a turn-table. More weight at the top will make it more stable, but at the same time it also makes it harder to correct if it destabilizes.
I'm a bit curious why it spins continuously and even speed up? Shouldn't it stabilize and then drift slowly?
I am afraid to test it with much more weight because the physical construction isn't as solid as I'd like it to be. Theoretically though, it is easier to balance with more weight at the top.