If North's 2♠ rebid promises six Spades then NS might reach 4♠ . Given how difficult it is to make they would probably be grateful if they didn't

It can be made double dummy although it would be very hard to find at the table

Cash ♠ A K. Cross to ♣ A then ruff a Club

Finesse ♦ Q, ruff a Club

Low Diamond to ♦ K, ruff a Club