Hi Robin,
You are right.
Originally I thought transmission easy than reflect .So order the dichro for reflect red first.Also I build the RGB system all use 635nm,same expensive .
Can't swap the two dichros only.Could you swap the red and blue lasers and swap the two dichros?
I must re-custom-tailor the dichro for blue at first position.
Problem I must each 50 pcs.That I must payment more money to order them.
Anyway I will try it.
Greeting
Jian