I just picked up my first nightforce and i dont know which base or rings to go with. I saw they have the Nightforce Steel rings and Ultra light rings. which one do you prefer. What height is needed for the 50 mm lens. like most people i like it as low as possible. I also so they had 2 different 1 piece bases and i wasn't sure which one is better there. There both 1 piece 20 moa bases just one says 8-40 screws and the other one doesn't say anything?