Has walnut ever been used for a fretboard and/or bridge on a classical guitar? There's an interesting nylon string guitar on ebay with 100% Canadian Wood including 42% Wild Cherry (back and sides), 33% Maple (neck), 8% Cedar (top), 4% Spruce (bracing) and 13% Walnut. All that's left is the bridge and fretboard. I don't recall ever seeing a guitar with a walnut fretboard or bridge. Is this more common than I realize?