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I really like the lines, shapes, and glow here. I'm not sure, but I think I might like it even more without the added texture--there's something mysterious and ethereal about the image itself that suggests it can stand on its own very nicely. But I am very intrigued by how the texture softens the black (I've been viewing it small to see what it might look like without the texture).

You honor me; I am most grateful.

Maybe I can help you by explaining the grain's role in the image.  I wanted to retain the strong black-white contrast while, at the same time, I wanted to ensure more tonal variety.  Does this change your mind at all?

I think I see what you mean, and that's a clever way of doing it if I'm understanding right--you're adding the texture with variations in the darkness of the texture screen so that it superimposes tonal gradations onto the image? The tonal variations you've achieved using the approach are really nice. I probably would have been messing with tone curves in Lightroom or Affinity to try to get the effect (I'm switching gradually from Elements 14 to Affinity for my editing, incidentally, and I'm really impressed by Affinity) because other approaches never would have occurred to me. I think what distracted me about the texture here is the regularity of the pattern--it feels like there's kind of a screen between the image and me because the textural elements don't wrap around corners to follow the perspective lines. Would it be possible to get the same level of control over the tonal gradients using a random texture instead of a patterned one? If it were random (like film grain) it wouldn't need to change orientation at corners. And I sure do like the creamy softness that the texture gives the darks when seen from a distance. 

Leslie, to answer your question, I simply don't know.  I'm going to investigate the possibility you raised - to see if I can add texture selectively.