Hi Dave,
Top tank just over 30 litres and bottom tank 40 litres.
I plan on 20l per hour, and usually burn under 15 lph.
I know it can burn 20lph as that what I used going from Gatton to Boonah once while been chased by a thunderstorms.
I feed from the bottom tank, I know it goes quite on a glide approach at 8.2 litres but on climb out you can use almost all of the fuel.
Kiwi