3♠ RKC seems like the dream agreement here, a simple 3rd round control ask will get you where you want: 1♦ - 1♥ 2♥ - 2N 3♦ - 3♠ 4♦ - 4♠ (King ask) 5♦ - 6♣ (DK, no others/3rd round ♣ control ask) 7♥ - P (Yes - Doubleton/OK great!) As a side note, do we really want to be in the grand? Needs either 2-2 trumps or 3-3 diamonds, not too awful I suppose though, around 78%? Without 3♠ as RKC, it becomes extremely hard to find, and I cannot think of an auction to get us there confidently. EDIT: Looks like Tim beat me by 3 minutes while I was typing, lol