Link to 4th Ed Rules rewrite
Long ago, my cousin (primary opponent) and I found that Panzergrenadier could be a much better simulation, and more historically consistent, without having to deviate from the system's mechanisms. As our list of validated house rules grew, it became apparent that the practical way to deal with referencing our games was to abridge the rule book. That is how the rewrite came to be.
The rewrite project actually began with the 3rd Edition release.
P.S. This is also an example of how I intend rules discussions and narratives to go.