Many Roads lead to Rome !!
Having just completed this process...I feel your pain....Fortunately...Both my Blue DPSS and Green DPSS are from Lasever...and the beam height C/L is 25.4mm...now complete paralleism between beam and DPSS head....well...kinda....close....BUT not close enough. I had to use some .02 aluminum foil tape to give the rear end of the green dpss a small boost !!
I also discovered...that adjustabillity in the X/Y plane is a VERY desireable thing when the time comes to superimpose the beams atop one another...to align in the nearfield !!!....SO....bottom line is there needs to be some slight room for moving the heads left/right !!! Perhaps this has been covered alot in some older post !!!(likely)....
And drill and tap is the ONLY way to go....Breadboards look GREAT....but I
bet they are a real PITA to use !!! Yes...you need to find the local fabricators that are willing to work on your small project !!! Unless you have your own MS....or can get " government jobs" done at work !!! Good luck !!
BoB / CDBEAM
Beam Axiom #1 ~The Quantum well is DEEP ! Photons for ALL !!
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Beam Axiom #2 ~Yes...As a matter of fact...I DO wear tinfoil on my head !!
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Beam Axiom #3 ~Whe'n dout...Po ah Donk awn et !!
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Beam Axiom #4 ~A Chicken in every Pot, and a Laser Lumia in every Livingroom !!
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Beam Axiom #5 ~"Abstract Photonic Expressionism"....is "Abstractonimical" !!
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Beam Axiom #6 ~ "A Posse ad Essea" ~ From being possible to being actual ...is the beam target !