I have a procedure for removing a heavy and expensive frame from a wall. I’d like to know if you see anything dangerous in this procedure or a simpler way to do it.

Based on past comments, I plan to anchor the 2 by 4s into drywall and not metal studs.

This frame is in a hallway about 3’ wide.

https://rick.sparber.org/WhatCouldGoWrong.pdf

Thanks!