Personally, I know *zero* about kingpins OTHER then what my restorer told me--there are tricks, tips and techniques to do it; do it well; and do it properly. He had developed some of these over time and became the "king" of kingpins so that many other mechanics, including some dealers, would send kingpin jobs to him for repair...
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored