Those are awesome basses, and Nikola Adamovic is a really cool guy and an amazing builder. I visited his workshop once, and admired some of his work. He has some unique views concerning the species of wood he uses. He experiments a lot with very unusual woods, and you won't find a whole lot of maple, alder, ash, mahogany, rosewood or ebony in his shop. He also strictly uses either certified woods, woods that have been seized by airport security, or woods from trees cut by the local municipal parks department in his city of Haarlem! This piece of spalted poplar for example, was taken from a local tree:
