I was thinking of doing either of those things with this lens, but just the sheer weight makes working with it difficult. You definitely can't use foamcore for this one.
I might just get some thin plywood, make a box with the lens at one end and a screen at the other to see what I can get coverage-wise, and borrow a telescope eyepiece to check it out that way. It must be good for something--I just have to find out what that something is.

Allan ,how fast were the exposures with your camera--did you have to track the camera,or were they short enough not to matter?