Hey lupin,
Thanks for posting your progress and taking the time to take pictures along the way. It's really going to help all of us 606'ers with our own inevitable cylinder head removal - whether it be a head gasket, broken glow plugs, timing chain/tensioner/guides, valve stem seals, etc.
What is your current odometer reading? I think I would like to be a little proactive with my engine and perform all of the above repairs before it is 'required'. What else are you planning on replacing while you have the head off? This is my first diesel so I am unclear as to what else is recommended if the head has to come off anyway (ie. clean the prechambers, valve lap, new oil pump)
P.S. I am nervous looking at the one picture you posted with the camshafts on the very edge of your table - do me a favor and put them somewhere where they cannot be damaged!