The headstock I cut on an angle and glued the offcut (reversed) to make the headstock a more even shape. The angle is required so there is downward tension on the nut, keeping the strings in place. There are plenty of other (and prettier) techniques for doing this. Cutting an angle like this into wood that is at the same time at an acute angle and at right angles to the end is quite tricky. If you think this might be a bit tricky for you, you can leave the headstock straight and use a tunnel nut, made either by drilling holes through your nut material or by cutting the grooves and putting a cover on top – OR, use a string retainer behind the nut to hold the strings down. (also known as string trees). http://en.wikipedia.org/wiki/Headstock Alternatively, just grind an angle onto it and add some more material on the back and grind that down too. This headstock is roughly 19mm (¾ inch) thick a standard ukulele headstock is about 12 mm(1/2 inch) thick. I am doing my own tuning pegs but if you are sensible and going with factory made pegs you will need to know how thick you need the headstock to be.