I'd like to thank everyone for their advice. It's all been very helpful and it's starting to make some sense to me now.
Took my first crack at the EP yesterday with a training knife (Kitchenaid Santuku I don't really care about). Made my first mistakes
but it's all starting to make sense. Completely understand why the angle cube and flattening plate are going to be a necessity for what I'll need to do down the road.
Hard for me to see the Henckels going back the factory edge in my lifetime unless I set them up as everyday knives for relatives or something. Grinding them to 15* is what got me started on this obsession in the first place.
At present I have the Shapton 500, 1000 and 4000. These are 29.4, 14.7 and 3.68 µ stones If I'm reading the comparison charts right. That would make the Shaptons about 300, 750 and 3200 relative to Chosera.
New plan is to start fresh and get a 15* angle on the Kitchenaid using all 3 stones with focus and time spent on using the Shapton 1000. Question:
When I do the microbevel should I use the Shapton 500? It's a pretty course stone. Not sure if that's a good thing or a bad thing when I'm setting the microbevel.
Thanks again for all the suggestions. Once I get this down on the Kitchenaid I'll be ready to progress to the Henckels, then maybe my Shun paring and utility and If I get cocky my Kikuichi. Ultimately I'm thinking I'd like to end up with a good carbon Gyuto but that's down the road.....