I recently posted the topic "why am I suddenly having trouble squaring up sheet goods". I was baffled as to why I was 1/16" out of square. What I found was that my TS55 upon plunging and releasing had a faint amount of twist or flex between the saw motor and the blade housing. This translated into a notch cut deeper than the original rubber strip trimmed to line up to your mark.
I used a 2.0mm x 25.4mm D nylon washer and cyanacrolate glue to adhear the washer to the side of the flange that attaches to the motor side of saw. This glides effortlessly during the plunge and has removed 100% of the twist or flex in the saw. No more guide rail errors. Total time to do this after head scratching, 2 minutes and $.15
I used a 2.0mm x 25.4mm D nylon washer and cyanacrolate glue to adhear the washer to the side of the flange that attaches to the motor side of saw. This glides effortlessly during the plunge and has removed 100% of the twist or flex in the saw. No more guide rail errors. Total time to do this after head scratching, 2 minutes and $.15