I'm sure I'm missing something basic here, but my journal won't let me add any additional components... I used the code to add one, and it worked fine. When I tried to add a new one in addition to the first code, it said that there are no errors, but when I update the layer, the new component won't show up. This has proven to be an obvious problem, since I want to add the update component.
EDIT: Never mind... I figured out what I did wrong. :)