...once you hit 20 posts, you become a junior member, and then you can edit your own posts, as well.
I have to get through 13 more posts without committing a gaffe?

Have you seen my track record over at Z's forum? I'd have to say that 15 to 20% of my posts have been edited because of a dropped word or the like.

(Good thing I previewed. I nearly forgot the "at" in the paragraph posted above)