you can still get three bows, go with a pyramid design, four inch grip 2 1/2" fades 68" tip to tip, 66" ntn, full width at the fades and straight taper to 1/2" tips, you can glue on a 9" piece at the center for the grip fade area, i you start with the limbs a full half inch thick you should have plenty of meat to work with to tiller, there is a good board bow series on youtube, and it's a pyramid design, Bub