I'm trying to align my Unisaw. I used an Angle Perfect and a Groz engineer's square to align the blade to the miter slot. I crosscut a piece of wood and it still rubbed on the blade at the back of the sawblade as it was exiting the cut. I then measured run out. The arbor flange has .004 runout, and the blade plate just bellow the gullets has .010 runout.
Then blade is an old Forrest I got from a friend, and the Unisaw is from 1969.
Even though the angle perfect and square say the blade is square to the miter,when I put that same square on the piece of wood I cut, I can fit a .008 feeler gauge between it and the wood, so it's not cutting square.