I went out to a lumber yard and selected a nice big piece of oak. Flat as can be, and perfect for building my 40 size planes on. It's sized exactly the same as the ceiling tiles I can get at the home store. One of the best things about it is that it's portable. I can take it over to a buddy's shop to build there, or if I'm feeling adventurous and the weather is nice I go out on the deck.