My search of nice sixstrings got me to yamaha.com, I was checking if there was better pics of TRBs than in yamahaguitars.com. To my surprise, I found complitely new TRBs! Model name is TRB6PII, and the site says it features atleast neckthru construction, ebony fingerboard and maple, bubinga or ovangol top. And that piezoknob must mean there is a piezo-bridge too? Just exactly what are these things?