grating wheels, 
the best come from 
www.creativelaser.de 
 
 
a machida grating from machida 
 
or a machado grating from creative. 
 
those are ultra wide effects with ultra dense beams.
 
clear linear plastic gratings from One Stop Laser Shop to glue over your bounces once in a while they're cheap and very effective. 
 
maxys modules and a combining dichro from one stop + a MM1 type mount, = rgy for about 300$ US. 
 
one beamtable actuator for the wheel and one for the machida/machado
 
cheap upgrades, both wow customers. you can also scan through the grating wheel and plastic grating, if your in a audiance scanning region
 
Steve