(Brought over from a conversation here). I caught the two-night stand in Chicago last weekend (Second night - DT covers Metallica's "Master of Puppets" - dare I say better than the original?), and while they blew the house down, I must say that from where I was I loved Myung's new JM6 prototype. I didn't want to post about it until I received some solid information from Yamaha (My emails have been bouced from Yamaha USA to Japan and back again... ), but here's what I can tell: A smaller body that the current RBX-JM6 (one of the main complaints) with rounded body edges. One soapbar pickup in the traditional "MusicMan" position. This goes with the information I reported in this thread on the modification to his main "bluegreen" bass. The new prototype also appears to have the assumed volume/pan/stacked treble/bass pot layout as the green prototype (but without the mini-switch). The "monorail"-type bass bridge seen on the new BB Nathan East II bass. Black hardware as well. (Bridge, tuners, and knobs) I've emailed Yamaha about information on the body/neck/fretboard wood, pickup model (Yamaha or aftermarket?), and whether it is a custom bass for John, or a prototype for a new JM6 model (I've heard "behind the scenes" that it is indeed a prototype, and will be introduced at Summer NAMM, but I'm waiting for conformation). I'll post any new information as it becomes available.