Just looking at his SS, seems like he may be a candidate for a sliding scale, not sure if you are already working it that way or not? Here's what I'm seeing from recent data:
PS 200 - 1u
PS 350 - try 2.4u? 2.5 looked too much on 3/9, and again today
PS 400 - 500 (?) - 2.5? (2.6?)
PS HI - 2.6 (or could try 2.5 to keep the drop from being so steep)
Well that's pretty vague :roll: but hope maybe it helps a little. I know it can be overwhelming when you are figuring out what to shoot each shot, especially with wide swings in the #s. I know when I was in that place it felt like I was literally on a roller-coaster, and I think I held my breath a lot of the time - just never knew if was going to be a blue # or a black one.
Hope you are having a nice weekend!