DIY mini split head mount. Did not dimension for this.

[u/Grays42]

Did not dimension for this, did not realize how close it was until I already mounted the center of the board.

I knew it needed to be roughly 60" x 12", and found a 64" x 14" scrap board and used it. Center lined it, marked my mounting lines, mounted the plate. Got it out to the trailer and mounted the center, bubble leveled, and fixed the center in place with drywall screws. Wasn't until I got over to fasten down the wings that I realized just how close it was to this rocker plate, I have exactly zero slip and it snugs in perfectly. Dodged a bullet. :\