If you use the tru-angle system, get the set with the 2 files on the angled block. You have to re-file the edges on the Zwickey's to match. you can do it with a course stone block, but it takes longer. the go from a course to medium to fine stones, and strop with leather.
Another method it the KME sharpener. Different angle than the tru-angle, so again, use a wider bastard file to file the edge to the right angle. The use a stone to hone.
After my fine stone, I use a 1000/6000 grit japanese water stone to really get 'em sharp. The tips being double thick are tough, but take your time and they'll shave. This method is time consuming to get it right.
I'm looking to buy the new system from Alaska Bowhunting Supply with the 2 polishing wheeels for a bench grinder. My Dad used to sharpen his filet knives and such the same way, and I have never seen anything sharpened like those were.