Chosen Solution
step 38 where you show logic board screws, if your looking at the picture the bottom screw just right of the RAM slot is NOT a course threaded screw and the one just above it IS. The colors of the little rings need to be switched according to my iMac that is.
You can do edits to the guides yourself. This helps all of us. I do all the time. Just insert your change and it will get patrolled and approved or not. I’ll be happy to approve it myself, I have that machine here and can check out your changes. You get to be part of the solution ;-) Thanks