Home made squares

[Dave Harris sctchbld]

                Ahhhh! Now I feel much better, thought for a while there no one liked the idea.
Here is another twist on the theme. I know everybody has seen these gadgets in the hardware store , come in many sizes and are CHEAP! They are also pretty precisely stamped at 90 degrees . If you are a bit shy about being seen using something so primitive , dress it up a bit like I did.