Has anyone done this? Consolidate their optics to one brand, one reticle for the basis of learning one system across the board. I'm kinda looking do do this for 3 or 4 rifles, different barrel lengths, gas and bolt. What optics in the 3-15, 3-18, 4-20 reasonable prices ,but have and old mk 4 and mk 6 to offset some of the costs. I have been looking at Vortex, Burris, Steiner,