Diamond stones are a different animal than ANY other stone. The amount of pressure you use in sharpening needs to be light, as in just the weight of the blade, or you will chew up the edge with the diamonds and have sloppy bevels. Yep, sloppy bevels just from using too much pressure.

The JYD is actually hard to sharpen because of its edge curve, you only ever contact about a 1/4in of width on the edge while sharpening.

Holding the same angle is something you will just need to work at, remembering to lift the handle to follow the curve and application of finger pressure to the opposing bevel/blade flat keeps the bevel being ground in solid contact to the stone. Stone position is important also, do what is comfortable and put the stone how you like it. For me I found it best when the stone is in front of me on a counter with about a 60 degree cant. To help with keeping even you can place the stone long ways in front of you too so holding the knife to the stone makes a " T " this helps take away the minds perception of changed angle because now you can see each side equally.

Back to the pressure thing, a common practice of mine is to use slightly higher pressure at the start of each stone the gradually back off to a feather lite touch. This reduces the burr but also smoothed the scratch pattern by only hitting the "high points" and blending the bevel. Your bevel is made up of 10+ grind lines that overlap, the high points of each grind line is what you are smoothing.

Here's a shot I took this past weekend:

Sure! Wildelife pics are always good. I drag my misses around taking pictures everytime the desert blooms.

Wow thats beautiful. It reminds me of when the weather fronts collide on the mountains behind my house. Nice work!

Wildlife? Here are a couple of my recent shots: