Norby,
Go to the wes wallace bow page
http://www.weswallacebows.com/
Then to accesories, then to the other link
http://www.weswallacebows.com/index.....main&cat_id=3
On this page you'll find the tim's tapering jig, and point and nock tapering jig. The point and nock jig is 50 bucks and attachs to a small disc sander, the shaft tapering jig can be mounted on a table saw, OR a belt sander also.
I have both, havent used the shaft tapering jig yet as I've made up one simplier that does ok if ya can stand the headaches lol. The nock and point jig works fine. My recommendations what ever you do get a angle gauge to check your angles. Costs is about 5 bucks (alaska prices). a board with a v groove set up to a disc sander, applied at the right angle to the disc would work great. You'll have to grind some of the leading corner off the block. Once its set, clamp it down and go. You'll need a stop, a simple block would work fine here also. Clamp it down where you want it. Nothing fancy but it would be effective.