I can answer any question pertaining to B5 model Passats short of automatic transmission rebuilds. I may be able to field some questions about other late model VWs with crossover engines. I do not address performance modification questions.
I have been doing all my own work on my two Passats for a decade. I have been giving sound repair advice on PassatWorld.com for the past few years.
No relevant auto related degrees unless a BSME counts.