So diesels dont like to sit....

The one thing on diesels that can be bad is if an injector gums up and seizes. If the engine has been run annually, or every several months, I wouldn't worry about it overly much. I leave mine to sit for sometimes up to a year at a time, I just check the injectors, crank it and change the oil.

Now if it had 20K miles in the first year and none since, I would check it very carefully.

Brian