liteglow:
It is so much easier to align by using the mirror.
You wont have to move the modules around much this way.
I know . Ive tried almost every combination out there..
I am going to build a few plates up that one can add the red modules to .
And offer them to the folks here so a Mirror mount and BS mount can also be added too.
Now you see why I am building a combined unit all in the same box 
DjDevNull:
PM me., I may have a few extra BeamSplitters laying around
"My signature has been taken, so Insert another here"
http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
*^_^* aka PhiloUHF