Could you elaborate on what you mean by beam table effects?
You could use some diffraction gratings to increase the range of effects on your projector. You'll need to find a way of diverting the beam from going directly to the scanners and onto the gratings. Perhaps a solenoid with a mirror attached, or another galvo. Or, use the gratings in front of the scanners, so it will project many mirror images. Again, you need to find a way of taking the grating off the path when ever you want.
Ohh, and welcome aboard
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