A very well known mandolinst Peter Ostrushko, who often appears on the Prarie Home Companion radio show from St Paul Mn. play a all koa [inc top]A style mandolin. He told me who the maker was but I can't remember. It is the best sounding mandolin I have ever heard.[the player may have something to do with this however. I'd love to have one, I've made 3 traditional material mandolins and hope to find some koa in the future.