ok, another question, only this one pertains to eye relief. i'll be mounting a new leupy 4x scope, so i'll need to slide the scope toward the rear to suit me. knowing this, which mount/rings gives the most latitude moving a scope. can i expect too have to crane my neck forward with the one-piece units, as opposed to just a weaver base and a couple of weaver rings (which i believe one has some latitude when mounting rings to base)? anyone using a fixed scope on their ml? thanks