Removing tiller arm from upper casting

One of my tiller arms is bent and I am trying to replace it. I have the rivets out but still can't get the arm out of the casting.

Any suggestions?

Never mind, I got it.

Rested upper casting on a vise with tiller arm between jaws but not tightened down. Cut a piece of wooden dowel about the same diameter as the tiller tube, put that on the back side of the tube and gave it a few good whacks. Popped right out!