I agree about getting the inner thirds, especially on the right limb, moving more. There is a spot maybe 8" from the fade on the right that is getting a bit hingy.
I use the booted long string to about 10" of tip movement. I do this in lieu of floor tillering. However, it changes the string angle and therefore the leverage and therefore the apparent weight of the bow. A bow feels heavier with the long string. This can cause you to think you have more weight to work with than you actually do. You can counter this by going to the shorter string earlier or by ignoring the apparent weight for now. All I am trying to accomplish at this point is to even things up and get the bow moving a bit.
If I have roughed the bow out right, I should be close to where I need to be on weight at this point. This is done by getting bows roughed out perfectly in profile and pretty close to final thickness, less than 5/8" across the whole limb, before starting to bend.
I always tended to pull too hard on a bow too early when I shortened the string too early. It's probably a mental thing for me since I judge the weight early in the tillering instead of actually weighing it
Maybe I should be a little more scientific.