A goal of mine is to put a very uniform, beautiful edge on my knives as well as family and friends' knives as well. I have noticed some variance in the look of the edge from one Wicked Edge owner to another.

What is normally done ensure that a bevel appears uniform and even on both sides, from heel to tip?

I don't have any experience with the Wicked Edge, myself. But I do have a Pro Pack 2 on order.

Skip to 7m12s in the video.

That's a good question - it most often has to do with the front-to-back positioning of the knife in the clamp, specifically as it relates to the curve through the belly. Have a look at this link to see the technique for mounting your knife to ensure an even bevel: Finding the Sweet Spot

Ahh yes, thanks for the link; that helps a lot.