Oh okay, those are good points. I should talk about those then. There were other approaches I tried that didn't quite work out, and I should discuss those (which also means that I don't have to totally throw out several weeks of work, which is somewhat reassuring)
Hm, well, it was just taking equations I could find on the Internet and then recoding them to be usable in Python's Matplotlib. So it wasn't like rediscovering how to project things onto a 2D stereographic projection.
Ah okay. Let's see here - what if what I did didn't produce results yet? The LSST isn't going to do anything for several more years, so the only thing I can say is that I coded a way to project stars on the grid in a different interface.