Current situation update: Despite recent slowdown, I believe I've managed one fifth of the whole posts to be edited.
Tip for those who just started - don't repeat my mistake, and keep record of number of posts you've edited - knowing the date of the migration from EZ to UBB, and knowing approximate number of your posts by that date, it will be easier for you to know what is your progress. I haven't done that, and now regret it
cheers