As en ex-Laser sailor, I see this Rooster sail combo is interesting but clearly not intended as a Phantom competitor, more as a bit of extra power for the ageing Laser sailors, to keep them feeling superior to those annoying children who keep beating them (as kids would have trouble with the 8.1).
When I got into my first Phantom, it was like the feeling I had when I got into my first Subaru Impreza Turbo - the wow factor - you just knew this was what you always wanted! No amount of add-ons to my Citroen would do. The Phantom flew and with good handling.
Remember those annoying Laser habits of the main sheet tangling round the transom corner in tacks, the loop in the trailing mainsheet that picks up ski-buoys if you're not careful, the death rolls when you get 'mugged' by a gust downwind.
Naagh, never again!
Nick