User blog comment:TenkouKuugen/Small Savings For Improving Type 0 Fighter Model 21/52/@comment-79.33.40.130-20170121231306

i dont understand how to max the plane, when i reach the last upgrade the plane instead of max wont become a different airplane? Type 21 Fighter Model 21 wont become a type 32 at max level? I'm confused, if i wanna use this metod i have to stop at level 9 ?