Playing off a 23 handicap

My last scores have been: 103, 104, 95, 94, 97. Twice I have had a round of less than 90.

I have made a few changes that have helped my golf game:
1. Slowed down my swing. It now takes 3 seconds to go from starting my back swing to hitting the ball.
2. I have changed the ball position so it's not so far forward in my stance.
3. I limit my back swing to my left arm is parallel to the ground.
4. During the back swing, my left shoulder touches my chin. Through the swing my right shoulder hits my chin before I look up.