Lol, perhaps that's the optimization, nothing to do with me Prowler
Added a new border around the whole diagram, and fixed the A19 down the left side, about half way down in P2, as the original was slightly damaged and had a yellow tint.
EDIT: Well I'll be, I have found a copy of this on my PC, production release 1985 (it looks like) PN-328015 Rev C, poor quality though + some stuff has been cropped off
Still, I'll try and repair what I can