As you age,so does your vision. I like a shallow V with a skinny post and a brass wire soldered along the posts top. Just drop the "bead" into the Vee. I'm sixty one and am farsighted,like most old !@#$% are.
Musta been the same in the old days,me thinks. Modified sights had to be made then as they are now. A wide cold chisel would do the trick. I don't know if it's recorded anywhere, but seems like common sense to me.
"Drawing a bead". My Dad was a military man(1940's) and what he showed me was to drop the front sight as deep as possible into the bottom of the notch. He called it "drawing a fine bead." He also sighted my first .22 in for me and explained as he did it. "Make the front sight 'square' in the
bottom of the notch. Shoot right out to fifty yards. Over that,you're on your own." I shot quite well after a bit of practice and a later German Mauser I owned shot the same sight picture.