Hoping this should be the last question.
I've been doing some final box calculations and it looks like the UXL-18 is 9.5 inches deep, with a flush mount, that's going to make it enter the box about 10.25 inches.
I was going to space the bracing evenly inside the box, so the front bracing would be 9.75 inches into the box.
Would there be any problem making a hole in the center of the bracket (like the pic below) that the magnet would sit in?
Edit: It also looks like with a 44 inch port the inside port is going to be about a half inch from the front bracket (which would be directly in front of the port opening).
Is it going to be an issue with the port opening being that close to the bracket?
There is 2 inches between the back of the port and the back of the box, so I could move it back.