Workbench ideas?

My neighbor gave me a 60 lb solid wood core fire door from an old building
(he worked at Knotts Berry Farm so all the stuff is legit OLD) and told me it would make a great work bench..it did! 4X4 post legs, a second smaller door as a shelf and a few diagonal stringers to keep it nice and rigid. Drill a few holes up top for a vice, bench grinder, etc.