munk_e: can you post your edited YASS for the 590is? Im still learning 
Thanks!
You know... I was fiddling around with a lot of things but I didn't end up making any meaningful changes. I attached the script I used in an earlier post. The backlight might save a little battery life but choosing good batteries or power source is probably more effective anyway. In the end, the most important thing I needed to do was set the variables correctly, since the purpose of my video was very different from a stationary point of view.
The working scripts people post tend to work across cameras (the exceptions to that I couldn't be sure of, sorry!) and for this script I found that I really had to study the language and commands used here to configure it, it's not all that intuitive to me. It's been awhile since I looked at this stuff though, busy life you know? The worst of it, for those of us learning, is that the information is scattered in a lot of places!
Also (not sure if this applies to anyone really) I remember an issue with the script going through the guess mode for a 2nd time. The compensation factor doesn't reset, so if you go light>dark>light>dark, the second transition to dark will use the last compensation factor that was determined, which could make for a very abrupt transition. So for most people, this would never come up unless you are shooting through two nights without shutting it off.
