Shytorque,
I spent the first 14 years of my RAF life as an Avionics Technician and can confirm what you say with regards to re racking of boxes is true. It was common practice to re rack or swap boxes as part of the fault analysis and even today on the "electric" aircraft I fly on I still see the GE's doing it.
I have told WK this and given him plenty of other pertinent information with regards to how work is carried out on aircraft on numerous occasions but like every other person who has offered him advice he chooses to ignore me.