For me the most interesting thing about the A2 is simple - the incan beam. I'm reasonably certain that it's just a by-product of the basic design, but the spot is actually a useful size- almost ideal for near to mid distance, where most people need light most of the time. I'm sure if they wanted to they could have found a way to have some silly little spot, but they didn't, to their eternal credit as far as I'm concerned.
Because of your post I dug it out of the car (side note: it seems like the perfect emergency car light to me, so I never get to use it!) and took it for my nightly dog walk, along with an Aleph 2 (DB700 U-bin) and they were very similar in range and spot size. I live in the country, it was a dark night, and we take long walks, so a good environment for comparing two similar but at the same time very different lights. If you wanted to get serious and make a scientific study of the performance of the two lights, you could spend as much time and effort as you wanted and still come to a :shrug: Two things stand out though - outdoors, our eyes like the light produced by something burning hot, and the A2 low is freakishly perfect for walking around in the dark in familiar areas.
It's also the only SF I own (had an L2 but sold it.)
Oh, nice job