Completed final research on heat shrink printers and placed an order.
Continued work on spreadsheet to add power and ground connections and wire names. Tried several different methods of looking at the data with pivot tables. Think I have what I need. One pivot table will show types of wire and total lengths. The other pivot table will show the number of different connections between key LRUs and the LRUs that connect to them. This might help me decide where to place the different Garmin LRUs.
Discussed mounting location with Deene and reviewed the instructions he told me to look at in the G3X installation manual.