Question regarding turns and Chaos

[Mei Ninja]

I'm currently slugging my way through the boundary plain, but I'm confused as to whether or not the number of turns I've taken is still something I have to worry about now that I'm in the process of the true ending and killing all the gods.

Do I have to kill Chaos before 500 turns? Or is the 500 turn limit something I only have to worry about to activate the true ending to begin with?

The achievement guide on this forums has me believing that the only time I can stop worrying about the turn count is after I beat Chaos for the first time, however the Agarest Wiki has me believing that turns only matter prior to entering the true ending.

Can someone help me out here?

[Nei Debrusc]

As I understand, once you've begun the True Ending, then the turn count no longer matters. Being below 500 turns unlocks the Ending, and after you've started on it, you can basically take as much time as you want.