I'm working on a bow kit from Rudderbows and it calls for 5 lams of 1/8 in. bamboo fast flex to be barrel tapered for a riser. They say to taper the last 2 or 3 inches down to thin paper thickness. Well, I started on the 18 in. one, and it came out way short. I would get so far, the ends would fray, I would sand those down, and then taper again. Just added up I guess. Is there a better way to do this without a belt sander? Thanks!