I agree... go to home depot and get a nice straight grain board and have fun... Last month I finished my 12 bow with in 1 Year... out of the 12 I have 2 that still shoot, 1 is a 30#@24" (way to light for me) & 1 is a 51#@24" pyramid 70" long bow. In a month or so a friend will be cutting down some maple, ash & a sassafras tree.
Do you know anyone that has horses? if so go there when their farrier is there and see if You can get a old rasp from them. You will also need something to scrap with... a pocket knife works great. You will also need a tillering board/tree & a scale (with out these....You'll be braking more bows then shooting them)