It's a pretty good argument for switching hands so that the edge is always facing you. I kind of wish I would have started out that way.One of my weaknesses is getting the angle on the opposite side of the stone, I can see on the near side what's happening but not so much on the far side. I've been tempted to buy those plastic wedge thingys but held off. So I tried using a piece of plastic that I cut up and flattened the ends so when you tighten down the stone it grips these posts. Depending on how wide the blade is, and the angle of the bevel, I can tilt the posts to the side to get it close and match each side up. So when I go to sharpen, I just need to rest the spine of the blade on the post, near the very edge of it, and then using two hands I can make sure that I maintain that angle while I push the blade across the stone. On the opposite side, same thing, rest on the post and draw the blade towards me, using my left hand as a sensor type thing to make sure I don't wobble or change angles. It reminds me of when I use the Ken Onion sharpener that you reference on the flat plate and carefully bring the blade up to the belt.
Untitled by GaryWGraley, on Flickr
G2
Holding or starting a knife at about a 45 to the stone seems to aid in keeping a consistent angle. Not that it really matters...