I think I've given the wrong impression of how much I know here: I've actually been at this for over a year now. I'm just out of practice. I used "Fighting with the German Longsword" by Christian Henry Toblar, which adapts Ringeck's system into a more accessible format than the original fechtbuch. I have a messer and I currently have Albion's 'Landgraf' hanging on my wall. So I'm not a complete novice.
That said, I've been reading through your primer as a refresher and I very much like it. It explains things in a very clear manner. One thing I would suggest including pictures demonstrating the five 'master cuts' to make them more clear, however.