by the way, going, advise of an optics specialist, for the unconventional setup of blue, green, red, scanners
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, etc

The dichros are big enough so you can get 3 to 6 smaller ones out of them.