hmm not sure if i understand this.
why do i have 7 interpolated values in my 2000rpm row?

I dont do it that way. I set the last column in DIMX to max target boost and the lower pressure columns to the range in between. That way the last column in DRL won't allow any overboost and the part throttle load control has a higher resolution. Works perfectly.

Are you saying spool rate is impaired using this method?

Because it is not neccessary to use more.

I assure you, it's as real as it gets, in fact it's so real it's straight out of a stock file.

Anyway KFLDIMX should have enough to convert pressure to dc. And preferrably it should be as close as possible to the actual DC on the top end, so you don't get big jumps in KFLDRL after.
As for why it doesn't go all the way - well it's steady state. It's not like KFLDRL, when you have spool, I is not doing much, it's all about P/D control.
So no, absolutely KFLDIMX does not need to go 95% or 100% or any other value. Don't forget stuff like lddimxn as well.

Lower your boost request or do the 5120 hack. You are asking for trouble that close to the ps limit

Cool stuff, thanks for sharing! Came myself to this solution about 5 years ago when started tuning ME7.5 on my Skoda Octavia.
Hesitated to share this solution because I thought everyone would think this is crazy This is the way it PID was intended to work - everything should be flat except KFLDRL. Then you just say I want 80% which should produce me let's say 1.5 Bar of boost and PID stays around this value all the rev range so boost doesn't float and doesn't overshoot. And then you just play with KFLDRL to achieve proportional delivery of boost corresponding to % to duty applied to Wastegate.

I only see fixed DC logs... confirm that plgrus_w == pu_w

I don't see anything wrong with using i-max to hard limit spikes. YMMV

Please post original logs and or ecuxplot graphs.

Short answer is that using imax to limit spikes is not riding it. Post spike you can start bringing i-max up to give headroom.