So after a final night of playing I started stripping the game down. I took lots of pictures and sketches to aid reassembly, as the plastics came off I traced around them and added notes of what went where. The main thing I noted on the sketches was where the different styles of post anchors were located. Post screws have bottom ends that screw into T nuts on the play field underside or are tapered screws directly into the play field and the tops either take an acorn nut or have a straight blade screw top, so there are four different styles.
I worked on one area at a time which was essentially grouped around a plastic. I left the wire forms and guides in place. I labelled anything tricky or that I thought might confuse me later and stored bits grouped together. I removed the apron and the ball launch guides and hardware, but left the wooden perimeter and shooter lane pieces in place. I also decided to largely leave the underside wiring in place. I think I can work in smaller areas as needed for thing like the flippers and drop targets.