In the early 1900's H B Sargent patented the framing square as we know it today. One of the best layout tools ever IMO. A good one will set you back 15 or 20 bucks. Add a set of stair gauges for another 5 and you really have something. Now the man has mentioned it in an article and away we go. Soon it will reach boutique level prices. I wish he would stick to his frilly little wooden squares with fancy European names that you can't take out in the rain. You can only laugh a lot he really has a lot of influence in the woodworking community. So a salute to a job well done.
Jim