Why would you want to swap, just retrofit the locking posts and the performance is just as good.
Original Edge and Edge Lo Pro trems have pivot bolts with locking screws down the middle of them so that once the height of the post is set it can be locked in place so that it can't move.Personal preference ... i like the Lo Pro, used to it from playing a K7.
I dont get what you say about retrofitting locking posts ??