Which "local guru" is out of business?
There are 2 shops in town that I would trust my engine to, and a couple of others who are good at all other things VW.
On the TDIClub "Trusted Mechanics List" you will find Wolf DMS
Wolfgang is actually a German guy and he drives a TDI himself. He is located on Craig road near Nelis AFB in the North East part of LV.
There is also a place called C.A.R.S. (Complete Auto Repair Specialists) on Valley View just north of Sunset (not far from the airport). Cesar (the owner) used to be the service manager at Desert Audi and all of his Techs are VW or Audi certified (or both). Their prices are good and I have been satisfied with their work more than once.
I have some experience with both of these shops and I can recommend both. There are also a couple of other shops that know VWs quite well, but I am not sure how well they know diesels. They are mainly experienced with gasoline engines.
I am not a mechanic and I don't fix other people's cars, but I do own VCDS so I can scan your car and tell you what fault codes are present if you need it.
Have Fun!
Don
P.S. The "Trusted Mechanics List" is here:
https://docs.google.com/document/d/1Lucw8ALCkLtt79MMw9JOG1E_dX57-raBhbhIFdtHnEQ/preview