I keep the regular 5 to 10 second delay for unfollowing. Next, I set my calender date as follows: ex. today is 11/30/2012, so I'll choose the 12/1/2012 date in the calender. Press scrape, wait 5 minutes at most, it'll draw up most, if not all, of the users you are following. I go on and select them all, press unfollow, and let the bot do the rest.