NAB raises the growth potential issue, my understanding of the latest gen of 'stealthy' aircraft is that actually growth is strictly limited by the current structure/shape unlike the F18/F16/Mig 29 types which have had their capability and capacity greatly increased through 'growth'. For instance changes to the F35 fuselage for instance to accomodate what I see as a minor mod to the hook have been reported as difficult and expensive by the company.