This is a pretty healthy way to introduce yourself, by being thorough and informative.
And photos make everything better.
There is really nothing else you can check, since you have already taken care of the issue that would have been the biggest bugger. As far as the gasket sealant stuff, I would just check the condition of the oil when you change it, just to make sure that some of that gunk isn't floating around in there. But, that stuff looks old enough that I'm sure whatever made it's way into the engine is long gone by now.... assuming the PO did oil changes
