Board Thread:Fleet's Prepared-ness/@comment-34122789-20180120045911/@comment-32647310-20180120180220

1-screw upgrades - No/Yes

No - all fighters other than the T96 require 2+ screws.

Yes - The M21, if upgraded as part of the 1x/day quest effectivly costs only one screw (base cost is 2, but you get a screw from the reward)

Statistcal Evidence of upgrading fighters - Yes, very much so.

While I do not know the exact breakdown, a +10 fighter effectivly has a +2 to its AA stat.

This means that at +10, the M53 (Iwamoto Squadron) acts as if it has an AA stat of 14 instead of 12.

This would also mean that at +10 the M52 (Skilled) is objectivly superior in every way to the Reppuu and the Shiden K2, as they would have an AA stat of 11.