A friend of mine owns a flea market/craft shop. Recently a customer sold him a large, very old, professional butcher block. It was end grain construction and had, obviously, seen many years of use. The top was worn badly with wear, at least, two inches deep in the top. Looked hopeless to me. But he resold it quickly to a guy who said he could flatten and restore the top. I have been pondering just how he did this. All ideas I could come up with seemed impractical and tons of work. BTW, this one was probably 36"X36" sq. and it was on legs that didn't look removable.