WHO DOES'T APPRECIATE A LOVELY bottom? Well here are the backsides of the last three Concert Pinecones. They are carved from a thick piece of maple and rendered concave on the inside. They are really quite thick and immensely strong It is these curved backs that give these ukes their incredible volume and tone. Every time I string a new one up I am astonished at the rich sound they deliver. And they don't look too bad either, And to think that this lustrous and intriqueing maple grows abundantly here in Puget Sound country.