Reverse text sequence

Is there a way to reverse a text sequence?
Instead of having the explode text take my text off I'd like to use it to bring the text on.
Using the reverse parameter doesn't work - or requires a separate reverse for every parameter that makes up the text sequence (approximately 10 or so) - I'm looking for a more elegant solution.

In the Text Sequence behavior, change the Traversal parameter to Custom, and keyframe it from -100% to 0%.

Thanks for the suggestion, but that won't work as the Text sequences are combinations of mulitple behaviors and there does not seem to be a way to affect them globally (at least a way that is obvious to my beginner eyes).
For example 'explode text' is comprised of:
align to motion
edge collision
gravity
random motion

The only solution I can come up with is to export a movie of the animated text, reverse it in FCP, then import it again.
Obviously not the most desirable way to do things.