If this was posted earlier I can't find it so I apologize. Did the Tinkers ever find "the song?" If they haven't that to me is a HUGE story line left unanswered. Why all the mention of the song and then leave it unanswered! UGH!
From the Age of Legends, you mean? I believe the song Rand remembered when he merged with LTT and that one are the same. But I can see how the ideal of the Song transcended through legend, and the Tinkers wouldn't accept it. The search became more meaningful than the destination.