Break-in new DD15 until safe to Parked Regen

Brand new Longblock (¾ actually with injectors, rail) new turbo, egr valve, delta-P and crossover. Had heavy blowby in the first 500 miles. Replaced the intake manifold pressure sensor. It consistently throws 3 codes:
SPN 3936 FMI 18
SPN 3464 FMI 16
SPN 102 FMI 16 (rarely)
There's 5,000 miles on the engine now and I changed the initial break in oil Rotella T4 15W40 at 2,000 miles with fresh T4.
I think blow-by gasses having clogged up my One-Box are the reason it's throwing these codes. I'd like initiate a parked regen but I'm reluctant to subject it to 45 minutes of high idle, reaching temperatures as high as 1200°. Am i being overly cautious? The opinions on a break-in period vary from 2,500 miles to 20,000. I called Detroit and they had trouble giving me a straight answer on the first oil change. They seemed to persistently relegate back to a time frame between standard oil changes.

How many miles to parked regen a brand new factory DD15 GHG14?

 

I use an Ancel HD3300 and with the last engine i was getting pressure differentials in the One-Box that were unacceptable and shutting down the truck. This was after I'd already been to a shop in MO and they did the 4.5h face cleaning. Twice. I guess the DPFs were cracked as I'd find out about 6 months later. But i was on a mine road in Quebec about 200 miles from cell service yet I'd had the peace of mind to acquire the Ancel and while it could force the regen it allows you to monitor all the parameters in the 45 minute process and it must certainly hit 1200°. Albeit the motor barely went above 210° as I recall, so point taken. I think this happened about 3 times before it threw the code to replace the DPFs and I would discover they were cracked. I bobtailed home the other day and found the SPN 3936 had indeed cleared itself. That was the main reason I wanted to Regen and try to burn off anything blocking the DOC inlet pressure sensor. If it doesn't return, it's just the SPN 3464 that, frankly, the SCR system has been throwing that code sporadically for years. I've covered or had covered nearly all possibilities on the Detroit Bulletin aside from replacing the MCM and I'm not spending the money on a code that for the annoyance of the amber MIL constantly staring me in the face in the midnight hours, I guess I could live with.