Attach a 3/4″ x 2-1/2″ x 28″ board to your miter gauge (not an original idea), then put a piece of masking tape on the table saw in front of the blade insert. Then cut partway into a board using the miter hold down. Shut the saw off and slowly pull the board back until the board is half covering the tape. Mark a thin line on the tape to indicate both sides of the kerf. Now when you want to make an accurate cut, line up the mark on the workpiece with the mark on the tape. Change the tape that’s stuck to the table when you change the blades.
– Bernard H. Derbyshire