When i added 445 to my projectors, it had to go on the end due to space. Conveniently enough, the casio projectors have a pass blue/reflect green dichro in them so its nice and cheap, assuming you have a suitable mount you can glue it to. I just use 2 part epoxy glue for mine. Pass green/blue, reflect red should be common enough from the usual suppliers, Rob, Marc, etcby the way, going, advise of an optics specialist, for the unconventional setup of blue, green, red, scanners
The dichros are big enough so you can get 3 to 6 smaller ones out of them.