I used a Laserwave 473nm coated PBS in my projector... I am not certifying that this is the way forward, maybe I copped a lucky one, who knows?
Here is the 445nm on a meter weighing in at 480mw....
Here is the 473nm on the meter at 300mw
Through the cube I measured a total of 760mw, so only loosing 20mw
Running the 445nm through the cube on its own I see zero losses, so the 20mw lost was in fact 473nm..
And for those of you wondering, Yes, it hurts like hell to think I spent in excess of £2000 on 500mw of 445nm only a year ago
Mark