With the benefit of a few hours sleep, I think you are right.
We got a bit ahead of ourselves last night seeing history repeating itself (first sight of the then brand new most recessive Fluffy under the special kitten) where we don't have confirmation.
I need the proof of the boy against Sassy Swank or the brand new kitten against Sassy Swank.
I've only got the boy up to making Super Posh against Super Posh so far. He's getting a new Sassy Swank mate today, so hopefully within the next couple of weeks we will have the proof we need.