Whoa!!! Kenom that is freaking awesome man. Nice job. ;D. That is one heck of a laser show. It would be neat if you could have the outer spirographs just as bright as the center one. Either way great video!!!
LOL heck no! I did this when I still had spares over a month ago. Yes the trick was done with a difraction grating in the beampath of my spirograph. The movie of course didn't do the laser justice as it was recording at 9 frames a second instead of what it should have at 30 fps.