Rockler sells a Stop Block Kit.
You could buy two. File a v-groove “index mark” at the exact middle of two opposing parallel sides of each of the two stop blocks. Position the fence at one of the distances, and lock it down. Push the two stop blocks up against the back of the fence, and lock them down, with the index marks perpendicular to the t-track. Make a color-coded Sharpie mark on the router table to each side of each “index mark”. (Be neat and it will look like a “decoration” on your router table top.)
To repeat that setting, move the stop blocks “index marks” to the color-coded router table marks – making sure to line up both sides of each block. Now push the router table fence back to the stop blocks, and lock it down.
I believe its harder to describe than it would be to do.
-- Jim Maher, Illinois
