Now that the sun has risen....

I can get my thoughts on paper.
Again, this is just an observation since my couch-butt-dyno is different from your driver's seat-dyno.
I'm hearing it spool up, but didn't see alot in the department of forward lunge or pressure building. What pressure are you running at 3/4 throttle when you run it up to 4K? This also could have been your recording device but the hissing sound was loud so I just want to make sure there are no leaks at the intake plumbing or any wastegates not fully seating.
Also, how many bends are in your intake plumbing,
especially 90-degree bends? Will be awhile before I can get back so I want to ask as much as possible. I thought I saw a few 90's in the build and this may cause airflow issues, not sure why I'm thinking of this now and not before.
Just making observations and I hope they are all meaningless, but that's how I like to work..only constructive criticism, since we are not there to help you out.
There's no doubt it will provide boost, I'm just questioning linear power delivery right now after 2K.