well you probably will want to upgrade to the latest classic first.
Then to avoid moderator issues. Import to threads 7.2.
This will allow you to keep the classic forum intact. But then any new posts will not import over. but you will have two boards..
Then the last step is to upgrade to threads 7.5.7
So that means keep the board closed for quite some time.
But is also allows you to test it since it is a import process.
Which means the classic is still intact.
Once done then close the classic board and do it again.
