Ha, 399 is just one of thousands:

[Truck] Custom wood dash, glove box cover, shifter cover. . . ., wiring and gauge additions. . . , brake adjust (knockouts are still in place 48 years down the road), glass etch all the windows. . . 

Build drawers for the grinder, freeze dryer, printer. . . .

[HOUSE] Add built in bookshelf, secret hiddy hole wood pillars, dentils over doors, finish 900 CFM kitchen exhaust. . . . .

The whole new 3-D printer world. . . .

Well, stuff the shop is made for numbers in the thousands (copper plating, plastic work, granite work. . . .