Not trying to be critical here. But really is this necessary? I have stayed in the site in the photo and can personally say that this site is almost perfectly level. I really don't understand the n...
I know on my system, I have Auto-level or Manual-leveling. You can raise, however you have no control on lowering. So you lift with Auto or manual until you are happy, but you can not just lower one jack. It is all or nothing, unless I missed something.