Great pictures and congrats on the seedlings! I do not think I am going to renew my membership in 3 days so I unfortunately will not likely see the fruits of your labor down the road (Unless you happen to frequent one of the other forums I do), but I do wish you the best of luck and hope they grow well.
I have an S. x 'Godzuki' in my collection. Very nice cultivar. Never heard of S. x 'extreme unction' but I will be looking it up. I wonder how this cross will turn out.