Doyle,
There were many such individual actions at Gettysburg that could merit coverage, but don't. For instance, in front of Culp's Hill. The Confederates are left mainly with brigade signs that don't do justice to their work there. Where Perrin's brigade broke through on Seminary Ridge probably belongs to the Lutheran facilities. But signs with maps showing regimental/brigade movements of both armies would be wonderful, although costly of course and would crowd the field even further. My lifelong project is develop such maps, at 15-minute intervals, that will enable the reader to stand at a point on the field and "see" all that went on around during the battle. For example, the Wheatfield changed hands several times, but that's hard to visualize with even the voluminous sources available since the maps are not at sufficient scale or accurate. Pfanz's books help a lot, but we sorely need a book of maps with a few comments on the action on the side. I hope to get my map book completed by 2013 (150th anniversary) if you can wait that long. Tom