Thanks Dan - Googling shows some people say:
CAMERA Ground Glass Textured --> | <-- Fresnel Etched EYES
insisting that the "rough sides" of the GG and Fresnel lens must touch, otherwise, there are two surface to focus on.... but other people say the Hasselblad way.
Well, just took some test shots. Will see how it comes out.
The point of the exercise is that I have an original SWC ground glass, which is rather dim. I can't afford a new style SWC GG with Acute Matte (>$300!!!) so I have Steve Hopf grinds a borosilicate glass for me. It's brighter but still not very even, only brighter in the center, and I am seeing the Fresnel lens pattern :-/ So not entirely sure about the worthiness of this yet.