Bending the fuel tank floater wire has been a challenge due to the interference of the vent line in both tanks.
With some adjustment to the wire the right tank floater wire has been bent to an acceptable movement.
However the left tank floater could not clear the vent line and the stiffener, not matter how i bent the wire. (replacement floater wire required, two units are available now as spares). considered to install capacitive sensors, but installation would have been even more complicated.
At the end with precious help from Lucio we slightly bent the vent line using a rod and the floater is now moving freely.