My first book repair with PVA looked great for about two months, then I found half the spine in my lap when I went to read it again. Guess we both learned the hard way.

Is it really that deep though? Feels like we're overanalyzing people who just forgot to cancel their subscription.

Man, that's rough. I feel for you on those returns... nothing worse than seeing the same truck pull back in with the same problem after you thought you fixed it. I switched to hand cleaning for the exact same reason on high-mileage stuff. Those little screens and orifices get so clogged up with carbon that even the best machine can't blast them clean sometimes. It's more work for sure but the peace of mind is worth it when you know every passage is actually open. I bet a lot of guys are running machines that just aren't getting the job done on these older 6.7s.

Noticed the same thing swapping parts in general, small upgrades usually save you time somewhere else down the line.

Haha, "gimmick for people with money to burn" was basically my exact thought until I caved and bought a refurbished one for like forty bucks. I mean, I still burned toast the first week trying to figure out the scheduling, but my wallet's definitely happier. So same boat, just with slightly burnt crumbs.