Quote Originally Posted by Mel Fulks View Post
Some of the Starrette small squares had a small screw to slightly move them out of “square” . They were mainly for patternmakers.
I suggest calling Starrette. The one I had or have….didn’t get much use, but I’m sure about the adjustment. Call Them .
thanks - I just returned via Amazon. This one (13A) was not adjustable, as far as I can tell.

'mark