Nothing in paticular, from time to time I am working on something and I want to see how the circut works. Like I wanted to eliminate the rev limiter for reverse, but the wiring diagram I have is so vague that I couldn't really tell how the circut is wired. Duravette posted it later with a clear diagram.The fiche wouldn't be of any help. The manual is as good as it gets. Is there something particular info you need?