● Un-taking a skill does not itself eat one of your skill AC slots, but you must make skill AC in order to drop a skill. (Taking a new skill does eat a skill slot, as usual.)
● You cannot drop a plot-role-exclusive skill, or a low-level tree skill if you have other skills that require it. In other words, start at the highest end of a skill tree if you want to be rid of something at the bottom.
● You can drop a skill no more than once per jaunt.