Thanks Bruce.
I did a bit more experimenting yesterday. I created a slightly bigger loop. 42" curves with a 36" straight piece on all 4 sides. I used my little point and shoot to try to capture results so the images are only 1/2 good and the sound is not great either. But it's not unwatchable by any means.
The first video - the 1st 35 seconds is probably enough to watch, but after that I experiment with different speeds and other things that may interest you.
The second video - I have more success in this one. I got things (the spring action) to work fairly well.
- walt