Drilled 1/8" holes all over the tub. Everything but the top. I'll have to reread the article again, but I think there was only one thing I did differently, and potentially wrong, and that was I didn't wait after putting everything together to add the worms. The guy at the baitshop didn't think I needed to wait for whatever reason, and that was much more appealing to the 9-year old put in charge of the project.