As I mentioned before, my Father was a master carpenter in his working days. About 15 years ago, when I was cleaning out my parents home as they prepared for the move to a retirment home, I came across a wooden jig. It was a stair jig Dad had made. I remembered him using when he built the home I was raised in, in 1941. It was a simple contraption of several wooden pieces, bolts, and was adjustable. I saved it. Just last year, I noticed a stair jig for sale in a tool magazine. It looked just Dad's, was aluminum, and cost $250! CHEERS, Bob