You actually pulled that off (and kept your clients)?

Showing pics of old wiring risks worked for me too, @jason544 knows how bad hidden problems can get.

Notice your tidy binder system with the clear sleeves. It taps into a basic human need to organize our prized things. I find the same drive when I sort my old records or set up my workshop tools. A little order saves so much frustration in the long run. Your approach shows how a simple fix can make a hobby much more enjoyable.