Re: editing, I usually don’t go back and do a lot of editing of my r-maps (though I don’t do them at this scale, either), but when running Pendragon, I did keep an elaborate series of family trees, which are a form of r-map, I guess. I just did them in an OpenOffic drawings file, with different colours for player knights (and yet another for deceased player knights) and it let me move the individual bubbles and even entire trees around to make space for previously undiscussed aunts and uncles, or for when a player knight would get married and I’d want to go back a few generations​ for their new spouse.