Scraping and planing...

My first thought was “Great idea!”

My second thought, though, is I wonder if you are running the risk of “unsquaring” your square?

-- Charlie M. "Woodworking - patience = firewood"

Agree w/Charlie. If it is a cheapo square, or out of square, I would think you are onto an easy solution.

Ditto : )

-- I'm absolutely positive that I couldn't be more uncertain!

Why not just tack a thin piece to your workbench top. Cheap and infinitely adjustable.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

I do a similar thing – but I just use a scrap piece of thinly sliced cutoff (that I usually have from resawing this or that)

-- ㊍ When in doubt - There is no doubt - Go the safer route.

A vertically adjustable stop across one end of the bench?

Charlie, as a followup to your comment I changed the config and tested for square after every use. As you can see I have secured both legs which should take most of the stress off of the square’s 90 degree angle. After each use I compared the carpenter square to my Incra square and my Starrett. I am happy to report no change or damage to the carpenter square.

-- This is a Troll Free zone.

Bump test

-- This is a Troll Free zone.

it works

-- Jesus Is Alright with me