What I've done for the last 3 knives I've made is grind the secondary cutting edge bevel until it's close to the center line on both sides. I then heat treat.
I will then angle my jig to grind off a line just slightly above my original bevel. This is how I start my primary bevel. I keep grinding at this angle until it lies flat with my original bevel. Then I pull back on the angle and do a new row right above the last bevel line. I grind at this angle until it meets flat with the 2 original grind lines. I do this until I get to the height up the spine that I want or both sides. I this use a sharpening stone to grind the cutting edge on both sides until they meet.
The problem with this method for me is my jig doesn't have an angle indicator. Since I keep changing my angle to shallower and shallower angles as I move closer to the spine, a lot can go wrong. One side is a different angle than the other. The cutting edge might be center in relation to the spine but not to the primary bevels. The grind lines might go a little higher on one side because the jig was set a little too shallow etc.
I just saw another method where you just set your angle however close you want the grind to be to the spine. Then keep grinding at that angle, equal passes on both sides. Heat treat before it gets too thin, then continue grinding at the same angle until the edge gets narrow enough to make the secondary cutting-edge bevel. Then you change your angle to lean the edge closer to the belt and grind the final cutting edge bevel.
I've included pics. Also I'm aware my secondary bevels and clip point edge aren't even. I'm trying to figure out how to get the clip point edge right. Any tips on that haha?