Interim Experiment Report
It took a few weeks before I got around to playing with this, but I promised to report back....
I took a small piece of aluminum "U"-channel, drilled five holes in it, and inserted some random LED's. The length was 1.5 inches - the height of the AOA indicator. I laid it down flat on top of my glareshield, up against the windshield, with power to the LED's. Since I was holding the contacts to the battery, and I didn't have a third hand, I couldn't really take a picture, but what I noticed is that I got a double image of each LED - a reflection off of both the inner and outer surfaces of the windshield. This could prove to be annoying. It was certainly bright and clear to see however.
One thing that I did notice is that when I stood th little assembly upright, so I was viewing it directly, my eye height was such that the top of the assembly was not actually above the nose of the airplane - hard to describe, but essentially, it blocked no sky. SO standing it u in the center, as far forward as possible is probably the same as making it reflect, in terms of not blocking sky.
So....mixed reactions to the test. Will ponder on it awhile. Got lots of space work to do for a few weeks.
Paul