After this stupid bidding I became declarer on 3NT, and missguesed everything, only shy discarding from RHO on what was a blind to me squeeze, made me get in the end what I though would be average 400. What I wasn't expecting is that almost everyone played only 2NT
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I'm sure almost everyone has played a variant of this deal, for me this was second time, and yet I didn't recognise grrr. Maybe next time. My local club is full of 80+ people, but I wonder how they managed to switch some of the small cards.

Help

N - E - S - W
ps!-ps-1♣-ps
1♦-X -1NT-ps
3NT-ps-ps-ps