I use my FEL and a chain, too. Works great...just one thing to note.
I've had this happen to me and saw a thread a while back where it happened to someone else:
Sometimes the post will be stuck in there real good (as alluded to in a couple of the posts on this thread). When that happens, the tractor will get pulled off the ground on the opposite end that the post is being pulled from.
Now I do the same thing the other fellow did, which is to use the FEL and stand next to the tractor and operate the control lever. This is not smart (although I can't say I've completely kicked the habit), because if the back end lifts up, the tractor will tend to levitate towards one side or the other. If it heads towards the side you are standing on, there is a decent chance that you'll find out exactly how much it weighs, because it will be on top of you, pivoting around that stubborn post and the front wheels.
This can be made a lot less dangerous (although not completely safe) by making sure you are *on* the tractor seat when you try to pull the post out. Like I said, I don't always practice what I preach, but I did want to mention that pulling posts can have some....uh...interesting and exciting side effects...Chris