I looked at the current seat I have and determined it was not leaning back as far as it should. It feels like I'm sitting in an old church pew.
I moved it 2 1/2 inches forward, dropped the rear 1 1/4 inches and was able to get the seat back to lean by 2 inches.
I have it adjusted it so it is now tolerable for me. But this cab is still very tight.