Will do. I've never heard that guideline before. I thought THX said the axis should be 0-15 degrees above eye level. The planned bar stool row will be way lower by comparison. Right now the midpoint of the screen is just above the tweeters sitting at 39". I think defacto seating eye level is 40". The screen is pretty close to directly on viewing axis.

I left more room above the screen for the planned arch. The screen is cheated 4" or so lower than room height center.

Btw, its 106" diagonal and the seating row is around 140" back.