The Bow was born from Rowan tree, I shorten the string after 2 years, thats mean it is more bended from base. Power is about 28kg continously decreasing after relasing the string. I just found flat fallen tree (d=12cm) and split it in two halfs. If u have time, its good to dry it first (standing in corner how it grew for 6 weeks), but I did not. Then just use your fantasy and one it have one more rule: the far side from shooter is !UNBROKEN! first layer of wood under bark.