It is also often the case that model from Thingiverse (or other platforms) are not working out of the box. I guess the reason is that the user who designed the model, has designed the tolerances which fits his own printer. So it is often a try and error game with these "print in place" models.
But as SandervG mentioned, the elephants foot is often the reason why it is not working. I usually use -0.3 for the Initial Horizontal Expansion, but sometimes I need more.