Good customer service comes in many forms. It can be difficult for manufacturers to answer every question that comes their way but the good ones will figure out a way to find answers. This is especially true about questions of compatibility and fitment since no one can physically test every possible product combination.
Scalarworks came up with a slick approach that I think other manufacturers would be wise to learn from. They created a scaled drawing of their LDM mounts that they can distribute in PDF format so that the dimensions can be controlled. The drawings can be printed by the potential customer, cut out, and used to check cheekweld, co-witness, etc. on their particular firearm. So, if you call asking if their mounts will co-witness with your one-off Blaster 9000, they may not know off the top of their heads but they can give you the tools to check for yourself.
You can view the scaled drawings under the Documents tab on their LDM product page.