Cm870 advise needed

[IrishKW]

My ordeal with a 2007 Cm870 in T600.

I've ran Cat's for the last 30 years, the last Cummins I had was a bc4. So I bought this truck because it supposedly on had 2k on a overhaul (never got the paperwork). It had a check engine light right away,I took it to Cummins, said EGR valve was bad $1700 for new one. My Cat background I decided to go ahead and take the mandate off because shop I knew in Colorado was good at doing them. Local shop pulled the ECM and sent it to them. ( mistake #1) $3k later no check engine light, no EGR life is good!

Not so much, just seemed to run rough. (Keep in mind this is all before I found this site) Took it to another local shop supposedly good with Cummins, ran tests said bad fuel lines because of black specks in fuel was getting air in fuel. New lines $800, life is good? No still not right back to same shop ran more tests, told me clutch was bad, I know the throw out bearing was making noise. I've been trucking long enough to tell the difference between a miss and bad clutch. (should have left at that point). It was pushing a little water out also, they pulled the injectors, had bad injector cup leaking water. Plus both cams and rockers showed bad wear. Cummins reman head, new cams, rockers, new gear pump $18k later, life is good?!

No not so much. Still runs rough plus new problem, burning oil 1 gallon every 4k miles. Took it back to same shop. No warranty on labor, and wanted to charge me to diagnose the problem. That is when I walked. Started researching and found this treasure trove of knowledge.

Bought injector leak tester, found a couple bad injectors, replaced them, bought valve spring compressor, replaced valve guides. No more burning oil.( finally progress)

But still not right I didn't think. Some days it ran really smooth, other days just seemed rough. So replaced cam sensor, crank sensor, both pressure regulators, check valve, barometric air sensor, fuel pressure sensor, intake manifold temp and pressure sensors, exhaust pressure sensor, all 4 actuators.

So I finally got insite and here is what I have found.
Factory this was 450HP CPL 8520 in site shows 565HP CPL 8518
Code on my ECM AB10423.20-8000
Code on insite AB10352.23
Other things on insite I don't understand
Fuel code FCOP412
SC Option 11169
Software 06060001

Plus my insite shows barometric pressure at 28.2 and never seems to change
Ambient air temperature 72, even though it is 90 plus out
Turbo control valve command at 70, all the time, stopped, idle, or stepping on the accelerator.

I generally get between 7 to 7.5 for mileage, 50% of my loads are pto pump off.
Pyrometer will occasional go over 800 but mostly runs 6 to700 range loaded.
Boost will go to 33 if I get after it, but I try to keep it under 20( seems smoother there)
this past winter I couldn't get to go over 24
If you get the RPM over 1700 it really feels rough, I generally run around 1400.

I like the 870, just want it to be right, and worried about possible early death due to bad programming. Considering taking it to Cummins and having them reflash it back stock and fixing the EGR, it went over a million miles that way. I'm not to good with computers, and sounds like anyone good with a 870 is a long way from me, I'm in the middle of Kansas.
I'd appreciate some input on this, I have gleaned a lot of valuable information from this forum. Without it I would still be throwing money at shops that don't have a clue.

Sorry for the book!