We did not happen to have a method to show a void in response to the keycard ask, which worked out nicely when West lead A♣. With hearts 3-3, it was not necessary, but nice. The only trick I lost was to the K♦ in West's hand.
I thought that this hand was instructive, as at the other table the opening bid was 1♠ and they never got close to slam. The declarer made one more trick than I did, thanks to a diamond lead.
I counted 3 losers, so I thought opening 2♣ was appropriate. I don't know what the other South was thinking. This was worth 13 IMPs in a match we won by 4.