Chuck, according to protractor about 76 degrees included angle off the long axis of the Delrin rod looking down on the utility knife blade and maybe 10 degrees off a section normal to the rod looking at the point. Don't think it's critical as I eyeballed the slot with a hacksaw. Needs the angle to "draw" the blade direction of finished cut without presssure. Just another sort of screw or inclined plane. At slowest speed on the lathe, it takes a very fine continuous spiral shaving and bottoms very quickly without pressure other than that needed to hold hull stationary. Twisted by hand, takes the coarser spiral shaving shown. Matter of feed rate and pressure something like all that pie and TUMS Xmas day. And that spring wrench isn't needed to hold hull when trimming; it's a McGyver for holding the hull stationary under the el cheapo BP roll crimper.
jack
Last edited by rabbit; 01/04/08 01:37 AM.
