First of all, .001 is irrelevant unless we know what the .001 is referring to. You may need to do nothing. If you’re trying to move a 30” long fence .001” you are already way past the accuracy you need. The 5 cut method is neat, but send some people down a rabbit hole.
Have you checked to make sure your fence is absolutely straight and all four sides are square? Lots of problems start there.
Are you using a precision square? If you can‘t see light under the blade over 12”, it is square, period.
When I hear people talking about thousandths of an inch in woodworking, relative to accuracy there is a point past which you gain nothing and just drive yourself batty. We need to realize wood has a mind of its own and a memory. A board won’t even maintain a dimension that much from morning to afternoon.
So, the distance from my pivot point is 28". I use a precision square (and I confirmed it's square) to start squaring the fence. Once I have the fence in line with the blade, I clamp the fence to the base and use a single screw to anchor that side of the fence down...then I proceed with the 5 cut method. Once I get it to, at least 0.001, I clamp again and install more screws. I'm sure it's those additional screws that's...well, 'screwing' with my accuracy.
As suggested by 'woodnthings,'
I'll try removing the fence, cleaning up the splinters from the holes and begin again. And, I'm also buying a brad nailer now rather than waiting any longer. I was looking at the 18 gauge Metabo HPT NT50A5 - the 'pro' series as that has an aluminum magazine whereas the NT50AE2 has a 'composite' magazine.
So, the question of if the fence, itself, is square and straight...it was when I first built it. If it was out of square, would I have been able to get it as close as I have been able to (before anchoring with more screws)? I don't know if being able to get so close to, and a few times right on, square, is an indication of my fence being square or there's no actual relationship.
And, yep, I am down a rabbit hole...a place I'm extremely familiar with!
I appreciate everyone's input.