Bruce, you are indeed a mad, and incredibly gifted scientist. Tell the truth, how many tiles did you use up to achieve what you called " It takes some amount of testing to get the proper mix and laser parameters for that "perfect" black." 

Not to mention, knowing what to mix with what to get X. Like I said my mad scientist friend, who is incredibly gifted.

Awesome tiles BTW. :-)

So happy to see you here as well.