[Electrothaumaturgist]

I always leave a note in the best handwriting I can muster, seal it in a bag, date it and try to find an inconspicuous spot in the back somewhere to stick it. A couple of smaller chassis I've done had the original caps that I restuffed and put them in the exact same position as the way they came out (only a couple of untouched original chassis got this treatment), and used carbon composite resistors to reproduce the original look, so it was very difficult to tell if anyone touched it at all. Yes, I always leave a note.