Sat Guy,
I merged your two posts. You may be limited to the number of posts so this gives ya one more. We're still not sure how the various user groups are structured yet.

On your pressure. since you now know the pump limit I'd give a couple psi margin to backwash. Probably about 9 psi. The grey color says you're catching something and eventually you should get it all.

Enjoy your pool.
Al
PS: curious about your username.