415c fuel tank measuring guage

I just took a basswood stick and marked it off every inch. It's not like a Cessna as if you dip the stick in the wing tank and it hits the bottom of the tank dry, you might still have 2 gallons of fuel in the tank. I figure if the stick gets wet, I have three gallons of fuel in that tank. I usually put enough fuel to do the flight I have planned without using any of the fuselage tank.

Does someone have the distances on a measuring stick for the 9 gallon wing tank. Just got my plane and need a tank fuel dip stick.
Thanks George