Yes. I went back to the explanation offered in the link. Looking more closely at the unit I realized that was how to take it apart. "Insisting" that the tip comes is sort of my code phrase for, "You're not doing something correctly so take another look." LOL Thanks.
I didn't realize the screwed on at first either. I accidently unscrewed the first time and didn't realize it. When I refilled I just pushed it on and I think that is why it leaked. It took me a couple of times before I realized it screwed on. lol Those threads are so small I didn't even see them. Of course I'm blind in one eye and can't see out of the other!