I have read the thread on the notable threads on these sights, but want to be clear on how they adjust. One loosens both screws on the blade, tightening one to drive the blade in the direction desired? The elevation screw is just loosen or tighten? Dang these things are small.. None of my gunsmith sets have anything close. A Jewelers screwdriver? Two are already buggered a bit, worried, lots or Kriol I assume. I can do some windage with the old gal, but would prefer to get them set right for my eyes. 1916 22/32 HFT single screw for elevation.