Recently, I watched some of a woodworking video. I say some, because once I saw the presenters method for checking square on the TS, I turned it off.
This is not squaring up a blade in reference to the top, it is getting square in reference to the insert. Little demonstration on how this will steer you wrong. Square, but not 90 degrees to the top.
If you have a quality combination square, this is the way you square a table saw blade. It’s the way I was shown and I believe it to be the most acurate method.
Surely this has been in a magazine article somewhere….. Just bringing it to the attention of any interested party.