Eamon, In Steve Chappell's book A Timber Framer's Workshop on page 159 there are plans for crib ponies, and also in Timber Framing issue #61 on page 13 Jack Sobon has plans for saw horses. I am 6ft.2in. tall so I added 2" to Jack"s plans which is a comfortable working height, but a little hard to climb on with a boring machine. Good luck, John