Kent isn't that far away from Bothell.
Pulling the bowl is easy, he will want to keep all of the fastening nuts and washers.
They normally reinstall with a foam rubber gasket with glue on both sides.
You can also use a reinforced wax seal that says, "Okay for wall-hung" on th e box. It's a special seal.
He's allowed to tighten three securing nuts. the fourth nut can only be hand tight, or you will be calling me for the new Glenwall toilet that I have waiting for you.