>That is why I recommend using a short unguided Dec graph to determine the actual atmospheric motion peak value.
Yep. And that is exactly what PHD2 Guiding Assistant is doing (measuring seeing with DEC guiding disabled).
>Then set the MinMove to between 60 and 80% of that value.
And this is where the PHD's recommendation greatly differs. It is much more aggressive. In my case it recommended a 0.20 px (0.6 arc seconds) MinMove with a reported peak DEC error of 3.71 arc seconds.
Using your 60% rule would put my MinMove at 60% of 3.71 arc-s, or 0.75 px, instead of the 0.20 px PHD recommended. I would say that 0.75 px is probably too pessimistic and something in the 0.30-0.40 range is probably more reasonable.
>I don't know how much more clear I can make this.
What you are saying is fully understood :).
As I previously mentioned to Bill and Wade, one of the outcomes of this will hopefully to get PHD2 to make more reasonable recommendations based on the Guiding Assistants measurements.