If it gets you out, then thats what its all about, but worth remembering that such a high quality sail has been designed around a Redline (Severne 100%) mast. With the amount of effort that has gone into designing it, ideally you want to put something equally special up the luff sleeve.
A friend of mine has been riding S1s with a Powerex mast and it seems to set fine. Never used that sail and mast setup, so couldn't honestly say that there is any difference, but it looks fine.
Reading this back it makes no sense really, but anyway, its a great sail!