I recently read a Tech Tip saying to remove the damper's main bolt and thick washer, then insert a long Allen head bolt that is smaller in diameter the the threaded hole in the crank. Small enough to just slide into the crank, noy thread in.

Now index your puller to the Allen end of that bolt and your puller will be pressing against it *and the crank) and the Allen bolt's head will help keep the puller centered.

Jake