I think he does have a Stick, everyone else in the band has one.
The harpejji is really cool. There is another cool instrument called the Kelstone that is very unique and made for several different approaches like tapping, sliding, plucking strumming slapping...you get the picture. One cool thing about the Harpejji is that it has an electric string muting system similar to Dave Bunkers that he uses on his tapping guitars. Very nice indeed.