OMG you need to see this at 50mW - I just got a couple of these from SZW and they're insane - want to get them on the LPM due to the beam without the diffraction gratings(hopefully tomorrow if I can get ahold of my buddy) - I'm pretty sure they're overspec, but right now I'm in the middle of a show and I've got them floating around the room and they ROCK...
FYI (not sure if they're all like this) but the second diffraction grating seems to "float" in the bezel, so you can shake, tilt, etc and change patterns without actually twisting it - pretty cool, but only gives 2 static patterns (probably only moves on one axis to ensure it rotates somewhat consistantly within the bezel...)
Either way - cool toy