You probably know a lot of this already, but take a look at a few Mike Van Wyck videos. As long as you don't have ADHD like some members on this board that want their magical answer in 30 seconds, if you watch these videos, I'm sure you will find a copule angles and tips on how to take the load off your shoulders and engage your chest more instead. I used to get tons of shoulder pain on a standard seated Incline Hammer Press and after watching all the videos, I don't have anymore shoulder pain and I actually feel my chest working throughout the movement.