Thanks Geoff.
I had considered doing what you suggest but since my wife and I are now in proud possession of our bus passes, I was hoping to rig something that wouldn't involve too much hopping around the side deck in brisk conditions, exactly the 'going like stink in 25kts' that you have experienced.
Our jib isn't a storm sail, but is a heavy weather sail that would ensure decent upwind progress in situations where the big 120% genoa would be furled to the point where it couldn't reasonably be expected to set effectively.
So I was hoping to have 2 sheets each side, we also have 3 winches each side, so it could have it's own.
Also, the idea of a permanently rigged inner forestay is attractive for safety reasons, and since we tend to do fairly long legs on the one tack, (12-50 miles) rolling up the genny first to change tack isn't too much of an issue, of course if we were setting the hanked-on jib it could just be 'flipped' across.............Bill