ok, thanks for the info. You might have to explain some of the technicalities, because im not exactly a laser expert. I was really into them for a while, but I got side tracked building a tesla coil. haha, I only own one laser unfortunately, my budget doesn't allow me to buy lasers, since they are very expensive. What are galvos and a PCAOM?
PCAOM=Poly Chromatic accousto optical modulator. It's a means of optically modulating a laser beam ( generally we modulate lasers using electron means, IE turning on and off the laser diode ) but with gas lasers and some DPSS (diode pumped solid state ) lasers this isn't possible since A) the modulation is too slow B) the modulation isn't linear enough or C) the PSU or laser just isn't capable of modulation.
Galvos are essentially just motors with closed loops feedback. They turn in very precise motions ( they do not turn in 360 degree motions ) they have mirrors attached to the ends to direct the laser beams on the X and Y axes and do this quickly enough to form images.
Hope that helped a little