Parabola and BrentD, I began thinking about this when I discovered what others know, that I could shrink my groups from about 6 inches to one ragged hole by using a smaller aperture. I know, from previous experience that the deer woods grow dim enough that with a half hour of shooting time, I can't see my front sight any longer. I made an aperture sight of brass and discovered almost immediately that I had to blacken it because of light interference. I then came across the Twilight. Of course, a scope would be the answer to all this, but well, you might guess what I'm saying. The Hadley is too large but I may experiment with the idea of the shade cup. Thank you both. Kurt
