Quoted from mbwalker:HEP,
This thread has been very intriguing to see the progress and attention to the detail. Now a sidebar question...maybe a new thread or add at the end of this one when finished that gives us a quick history about how you got to this level of detail? Obviously, it had to start at one point of just fixing a broken pin. But did the level of detail ramp up quickly or did it simply progress gradually? Did you learn to solder, understand any electronics, methods of cleaning, painting, etc. and was it self taught? Did you have some to help guide you on the way? By no means want you to spend a night typing a long story, but something brief would be rather interesting.
This is probably the best I can offer for that.
https://pinside.com/pinball/forum/topic/the-evolution-of-hephigh-end-pins