I switched to single bevel heads this past winter. They are half the work to sharpen on a KME as as double bevel, since the back side takes only a stroke or to to smooth out. I found an old thread through the search function here on Tradgang that mentioned using a mill bastard file on new heads before moving to the KME sharpening stones for new heads that aren't hunting sharp out of the package. This tip took me from couldn't get a single bevel sharp to shaving sharp broadheads in ten minutes or less per head. I started shooting the longer 200 grain single bevels from Grizzly and moved off of the KME sharpening stones to sand paper with the same results, while using the KME to keep the correct angle. I will list below my process in the hope that helps out someone else.
All sharpening is being done with a KME device
The file is typically only needed when the heads are sharpened for the first time or damage to the edge has occurred from shooting after the initial sharpening of the heads
Shorter single bevel heads
ten to twelve strokes on a mill bastard file on the beveled edge (bevel facing away from me and pushing the head away from me)
two strokes on the flat edge (bevel facing away from me and pull the head towards me)
fifteen strokes on 180 grit sandpaper (bevel facing away from me, all strokes are both pushed away and pulled back to me)
two strokes on the flat edge ((bevel facing away from me and pull the head towards me)
fifteen strokes on the KME Coarse Ceramic Stone (bevel facing away, pushing each way and pulling each way)
two strokes on the flat edge (bevel facing away from me and pull the head towards me)
Ten strokes on the KME Coarse Ceramic stone (bevel facing away, pushing away only)
two strokes on the flat edge (bevel facing away from me and pull the head towards me)
Ten strokes on the KME Medium Ceramic stone (bevel facing away, pushing away only)
two strokes on the flat edge (bevel facing away from me and pull the head towards me)
Ten strokes on the Dan's super fine grit Arkansas stone from KME
two strokes on the flat edge (bevel facing away from me and pull the head towards me)
Longer single bevel heads
same steps as above, except I substitute the following sandpaper grits for the three stones
Coarse stone - 400 grit sandpaper
Medium Stone - 800 grit sandpaper
Fine stone - 2000 grit sandpaper
I touch up the single bevels in the field with a leather strop to bring quiver dulled arrows back to shaving sharp
Pressure is always light across all sharpening surfaces.
I have experienced that heads sharpened this way, both single and double bevel, hold an edge really well.
I had a double bevel Ace standard pass through a doe last year and still shave hairs to some extent before touching it up.
I have shot the single bevels into a Block target multiple times before needing touched up