So, some of us in either of the different preview programs are concerned on the UK thread about obtaining an IPSW for the 6S units. Send as there is not one right now (when I checked) we have no way of restoring a 9.1 backup. And who wants to downgrade? I will as a last resort though. In short, does anybody know a workaround? Was this the cade with 8.1 Beta last year? (I got mine in October so they were out then).