Steve, that seems to be a matter of proper setup on the saw. I’m sure that would be a frustrating experience for me and I hope I never have to do it. Mine seems to be in pretty good shape.
Tonight I tried to make a right angle fence using a half lap like Jeff said. That failed. After gluing up what seemed to be a perfect fight angle, when I took the clamp off it was out of square. I didn’t try that again.
Instead, I went back to my original idea. First I checked to make sure the kerf was square to the front of the sled. It’s good. Then I set up one fence with one screw to act as a pivot, squared it up using a speed square against the front of the sled and then screwed it in place. I checked for squareness with every measuring tool I have about 10 times each and decided finally it was good. Then I repeated the process for the other side. I think I paid a lot more attention tonight than yesterday. It is as perfect as I can make it. I used a framing square to make sure the fences are 90 to each other. That came out very nice.
Unfortunately I couldn’t test it because the baby is sleeping. I plan to do 2 tests. Make a picture frame is one. The other is cut a triangle from each side and compare them side by side. That should tell me that the fences are square to each other and to the blade. Fingers are crossed.
Losing fingers since 1969