The procedure we have used is tighten the lower screws prior to putting the optic on the rifle, loosen 3/4 turn from tight, then install on the rifle, level, tighten the upper screws, remove 20in lb torque lower and recheck torque upper, and re-install. It's not very difficult. It's a cleaner procedure than split rings that clamp on a base rail, which require assembling all the pieces around the optic.
On the rifle obviously that's where L-shaped keys can also be used if you want to use a different method.