Yea atomarc,
This 1-3 wire thing probably has taken up lots of prime real-estate in my brain and removed a year or 2 from my life span.
I had all sources telling me to run 2 or 3 wiers and on the other hand I had my brother in law (who I trust) simply telling me to use one wire.
Throw in a resistor and a push button starter to the whole mix!
As Merle once said "One day we'll look back and say, It was fun"