I'm surprised nobody has invented a dipstick like we used on a Victa Airtourer. Same scenario - Fuel tank under the pilots seats with the filler cap on the side of the fuselage and no way of checking the level. Victa very kindly provided a sort of wobbly dipstick that would go round corners and indicate fuel level. The aircraft's fuel gauges were as good as useless anyway!
Happy days!
