I got Thorvald Two Stones to join me on the Isle of Despair. I read somewhere that you need to briefly remove him from the party when you speak to the entrance guards at the Wheel Clan base, and then you can ask him back. I did that but despite this every time I go anywhere other than the Wheel Clan he either says " What are we doing here. I want to go back to the wheel clan" etc. or complains that I have no intention of taking him back to his clan and simply leaves the party. Is there any way of getting him to stay on permanently?