I noticed on the MFD fuel system page that there is a section for five external tanks. Can this section be activated? I reviewed the aircraft.cfg file and noticed that the following fuel tanks weren't used: Center1, Center2, Center3, External1, External2. I was hoping that if I defined those tanks, that their fuel state would show up on the MFD. No joy. However, my total fuel amount was updated to reflect the increase in fuel.