1. I shoot the lower first. Personal preference on that one. Generally are coming up on a bird and I tend to shoot high if I shoot top first, gives me a little compensations shooting the under.

2. Improved on bottom and modified on the top, both in my 20 and 12

3. 7 1/2 and know your limitations.

4. I use a Carhartt vest and love it. Many quality vests out there. Try a few on and see what you like.