Nice, thanks for sharing, Rob! Looks like a nice, organized setup. I have to agree that a steady hand will produce a better edge. And what better to do that than a honing guide? It never changes angle and reduces the chance for error, since it always holds the blade steady.
I agree that the film will last for a long, long time if you keep it lubricated with water. It doesn't clog like sandpaper. And thanks for sharing the tip about the cork! I would imagine that a thin, waterproof rubber would do the trick, as well. The blade will bite into the material a little bit for grip.
I'm eyeing up getting a grinder to help with the heavy material removal when I set an initial bevel. I still plan to use sandpaper/film to finish with. That will likely change down the line to natural stones or better synthetics.