Power Disc Brakes not working on hard stop?

To be clear, I did not tell you or anyone else how to do anything. I advised what I did so others would know the steps I took, glad to hear you think I adjusted the manual proportioning valve correctly. The reason I posted this is because I'm at the end of my knowledge and ability and was looking for help, so to tell me to go through it again is not real helpful. However, your example has me wondering about the booster and if there may be a limitation with it. I don't see anyway to adjustment other than the pushrod between the booster and MC, which I did check and was correct according to the tool i referenced. Anyone have any idea why the booster would limit braking or how I might adjust?