So I finally got to repair my fuel gauge issues today!
Some big helpful findings!
First: the distance from the bottom of the fuel guide post to the center of the floating float at flood stage (left below 28L) is almost exactly 2 cm. Makes it extremely helpful when trying to calibrate the right fuel sender !
My fuel arm was way off from when I got my replacement complete unit. It displayed 5.6L or something at fkod stage. I went to fix it and went way off the rails. When I had the fuel pump out to figure out why I stalled no fuel a few weeks ago I discovered the pump was fine the left sender was reporting 33L of fuel when there was ZERO.
Since I had the right side out I bent the float arm based on product photos and got sorta close: reported 0.2L at flood stage which if the parts never failed would be near perfect (0.0 would be ideal).
The problem is that when things aren't working properly and you are using test six to monitor say the siphon jet, you NEED that 1.5L of warning to get to a gas station. 0.2 is "background noise".
So I had two goals today: 1) fix my left side sender (success I will make a new thread to show how to do that) and 2) calibrate my right side sender to get something like 1.5L at flood stage.
Bingo! Also success!