Sikwan nailed it. Doktor A has the experience and from most all comments (99.99%) in the forums is very willing to discuss things on the phone and share information. He just today publicly posted this in response to a Yahoo Sprintervan EGR cleaning question. "Gene, Call me on my Sprinter Hot Line- 412-366-6165 Doktor A"
I'm quite certain I remember a thread a while ago complete with some pictures by somebody who embarked on the head removal journey and other major work, but I couldn't find it by searching. Maybe I recall incorrectly.
This post sounds like he might have either done the head himself, or was intimately involved. He asked some pretty specific questions, which Doktor A answered I might add. You might try a PM or e-mail to Si.