This is for people who have already used their Skilled Pilot Medals to purchase a plane:
Some of the planes (the Mig, Su-37 and GAF) say they are "Max lvl." What exactly does this mean? Does this mean you can upgrade beyond lvl 10 without an lvl cap increase form, or does it mean that plane is already upgraded beyond lvl 1, and if so, what lvl? 20? Less? Or does it mean something else completely?