I'm trying to find the picture I have of them, but it's also possible that he's not in THAT particular incarnation. I guess they have two or three "bands" that stay in certain geographical areas similar to how Trans-Siberian Orchestra does. I hosted pics of their zither for them and got to talk with him for a bit. It sounds like the ultimately cool gig!
Check out this zither!

Here's what he said about it:
The bottom section is like six lap steels. Different chords with different voicings. From top to bottom:
E Major (Voiced lowest to highest - 1, 1, 5, 1, 3)
B Major (1, 5, 1, 3, 5)
A Major (5, 1, 3, 5, 1)
C# minor (1, 5, 1, b3, 5)
D no 3rd (1, 1, 5, 1, 5)
F# no 3rd (1, 1, 5, 1)
The lowest notes are an octave below a guitar, so the chords sound huge!
The top section (the harp) is two and a half octaves of E major. The yellow labeled notes are E and B, the green notes are F# and C#, and there's one red note... A#... the only non-diatonic note on the instrument.
The zither output goes to a Hendrix Wah, Ernie Ball Volume, Centaur Distortion, Full Tone Distortion, Ibanez Flanger, and a Line 6 DL4.
We use an Orange Thunderverb through a 4x12" cabinet.
Big sound.
(BTW - I just found the link to the video of him in Berlin, but the video has been taken down...)