As Frantium said, the clamp on the Lansky and the DMT stones are the way to go. I have both. For years I used the stones that came with the Lansky. The work okay. I bought a couple of Lansky diamond stones but I don't really care for them. I bought a DMT aligner and I use the diamond "stones" from the with the DMT holder. This setup is the best so far. I use a black (extra coarse) DMT at a 15 degree angle, then a blue (coarse) or red (fine) at a 20 degree angle for a few strokes, finish by stropping on a piece of cardboard (not corrugated) to remove the burr. I can't shave very well with it but it cuts stuff I normally cut. By the way, I sharpened free hand for 15 or 20 years before getting a Lansky. I thought I could sharpen pretty well, until I saw someone use a Lansky. It took awhile to convince me, but I finally switched and never looked back.
Danny