Just dropped the car off and fingers-crossed on it being turbo-related. Only other thing we talked about being a potential is an ever-so-slightly bent rod.
Could smoke until the engine is warm enough for tolerances to tighten up and the smoke stops. Unless i'm missing something that logic checks out for me, but I'd also rather not put that out into the universe
Edit:
Backing plate on the rear turbo is looking quite quite oily for something with 2500 miles on it. Looks like we may have it targeted.
Edit edit - yeah the rear turbo has a bunch of shaft play. Just talked to the shop again and they're in contact with Pure on the next steps and what to do from here. About to go pick the car back up now and I guess we're waiting to see what's up.
Good news here is that presumably nothing is internally damaged anywhere, just the hassle of a new turbo having problems.