I saw Tim's work with these at SELEM and again at TEXLEM- the sounds made by the galvo engines sounds a little like dubstep
It was pure genius what Tim did with that.
IF you live within 5 or 6 hours of Newton N>C> you are a fool for not making the drive to see SELEM- I drive that far just to join up with the carpool making the 16 hrs drive from Dallas- thats round trip 42 hrs- and I have head of some that live just a few hrs away complain about the time to drive!! WTH?? even if you must drive there at night and leave the next evening you will be very rewarded for the effort.