Sibernut, I assume that's my elbow you are referring to. Interesting point. I'm guessing that would be a wire from the elbow back to the battery -ve. Is that what you mean? (My rudder post is bonded back to -ve in this way.) I removed that elbow recently, and it looked in good shape despite probably being undisturbed for decades. But it would be a simple matter to add a bonding wire.
"Cute" is the word most people around here use for Puffinn. And everybody knows Puffinn. If I strike up a conversation with a total stranger and mention the name of my boat, I usually hear: "Oh, we love that boat, it's so cute, it looks like a bath toy." I even know a family who refer to the place near my mooring as "Puffinn Point".
Here's some original Finn 8 brochures with layout diagrams (although there is a lot of variation because they were sold in different levels of completion). I found these on a boatsales listing for "Lady-J" in South Australia.
Apologies, Rod S, for hijacking your thread again!