Title pretty much sums it up.  I'm finding the single bevel very difficult to sharpen.

Goodluck! I gave up pretty quick  

a good file re do the bevel a little shallower, try a using a sharpie that way you can see the consistant angle then just go down in grit when fairly close try some bore paste on leather to finish

http://www.youtube.com/watch?v=5umxVy7uhLM
This video helped me more than anything. I have always been sharpening challenged but I can get my heads hunt ready in minutes now. Worth watching.

arrowbuster, very nice video.

The single bevel no mercy is IMO, the hardest broadhead to sharpen.  Just turn it into a double bevel and be done.  

The problem is that you end up shaving the location where the main blade is brazed or welded to the frame, and you don't end up sharpening the blade.  

The only person that might be able to help is Ron at KME...Ask me how i know, as I have had the single bevel no mercy's and a KME broadhead sharpener and spent way to much time on these heads.  They are fine once you decide to turn them into a double bevel.

I had the same problem. As a knifemaker, I've never had a sharpening problem, but with the single bevel, You have to get through the braze, through the middle layer, then the braze and then to the far edge of the 3rd layer to get a true single bevel. I much prefer the double bevel and will convert my few single bevels to double bevel. That way, I sharpen to the center of the middle layer. Quick and simple.

I sharpen them just like an old style Grizzly.  Take a file to them and set a nice wide bevel (shallower angle) all the way through.  You'll need a little extra clean up work on the back side for the front triple laminated portion, but not a whole lot.

Zwickie's single bevel is not the optimum execution of the single bevel concept IMO but they do sharpen and work just fine.

I use a KME knife sharpener (not the broadhead jig) and do just fine. Yeah, you do get into the re-inforcing layer at one end, but I have not had a problem with it.