I cranked and counted the clicks in my NXS's and would assume that I could center them by going up halfway. I really like how crisp the Nightforce turrets are - takes a lot of use to get a MK4 as "clicky" - although they will get there.
I believe that Richard Near makes higher sloped bases. Suggest that you contact him as he will no doubt explain what is available. He has a pretty good range of products, will fit quite a few actions.
You have seen our Near bases - they are superb. Marty's (Badger Ord.) are also tops. Pretty tough choice - Richard has a wider variety of styles, Weatherby etc.
Richard's e-mail is: firstname.lastname@example.org
and you can reach him at (306) 463-3484.
These Picatinny rails are expensive but they are incredibly uniform and great if you like to switch scopes around. They let you reach out there. Hey - your dollar is worth $160 up here don't forget!