RE: single pin
I LOVE a single pin sight for hunting. What I did was set my pin dead on @ 25 yards, and just left it alone. I was 1 1/2" high at 20 yards and 1 1/2" low at 30 yards. That ain't gonna matter at all on a deer. 1 1/2"?? Whoopidie doo.
It makes for a very uncluttered, and clear, sight picture. Also, no confusion at the moment of truth as to what pin to use.