According to the CubCrafters configuration web page at http://cubcrafters.com/carboncub/fx3/configure it outlines 2 x 22gal fuel tanks for a total of 44gal. I've heard through others that this is actually four tanks, 2 x 12 gal inboard tanks with a 10gal outboard of each with an interconnect that passes through a rib. As a result of the design there is about 5 gals unusable fuel. It is also suggested to delete the 10gal outboard tanks and use the default, I believe per the SS, of just the inboard 12gal tanks. This improves roll performance but the ideal setup is to instead us a belly tank for extended range operations.
I have several concerns about modifying the default FX tank config.
1) Resale: This is not something you're going to install later on your own and may make the sale a challenge unless a belly tank is included and desired
2) The flight controls were designed for this so roll performance should not be an issue, I've heard nothing but great things about the new ailerons, etc.
3) Nothing says you have to fill up the wing tanks beyond 25gal total keeping the outers dry if that was a concern
4) If I'm traveling them I'm most likely wings level the majority of the time so the outer tanks are a non issue and may help make for a smoother ride
What are your opinions on the wing tank configuration in a FX3? How would you order one?