I was South, and surprised to see so many blamed me for the auction. Call me optimistic, but I hate to miss slam. Since the vulnerability is red to white, overcaller could be light. There are too many combinations that could produce a slam if North had 13-15 hcp. Because I had SJ, North could NOT have KJxx, he might have KTxx (assume two stoppers) or AQxx. As long as North had at least 6 cards in minors (as 3NT suggested, with 4-card heart, I would start with dbl) and useful cards, slam was very possible. And because I have extra of at least a K, 4NT should still be safe. As the actual layout, the auction should be ("standard"): 1D - (1S) - dbl - (p) 2C - (p) - 2N - (p) 3NT - ppp. Or if North wants to be aggressive, direct 3NT after 2C is fine, too. I don't even need 15 hcp from North to make slam: KQxx, xx, Axx, Axxx, or KQxx, xx, Axxx, Axx or AQxx, Qxx, Jxx, Axx, etc ... I am sure all of you who blame South would miss a lot of slams.