I would like to suggest that this thread be made "sticky" or a FAQ, or something like that. I finished Brian's book, and went out to shoot and immediately started wondering what I should be seeing in terms of "sights lift". This thread was the first hit of a Google search for "Enos sights lift", and I think it tells all.
In case there will be an update to the book, this level of detail on seeing the sights lift would be my #1 vote for clarifying an otherwise top-notch guide to exploration.