I've needed to do this and finally bit the bullet and talked to my old attorney for a bit about it today.
He said it was a good idea, given the time that has passed and changes that have happened.
He wants me to get a few things together...and then we'll talk.
Now, I'm not so sure I need a lawyer (i.e. new retainer and whatever charges that go along with it) for something like modifying CS, but I also don't know how to do on my own...so is it worth hiring this guy again (or maybe finding someone new? our D was real fast and didn't go as far as like cars, college and whatever. It sort of ended up where we knew what to expect until each child entered high school. As far as after middle school; there's nothing 'in place' outside of CS until they're 18, you know?).
I just don't want to rack up lawyer fees for 'nothing'.