See update below with my recommendation


Update 3/2/20:


Coda:
I enjoyed discussing the possibilities of this hand with Steve Bartholomew. We discovered one situation in which the end play would not work, namely if East happened to start with all three missing spades (11 percent chance). In that case you are back to guessing who has the king of clubs.
By using a clue from the bidding to visualize East’s hand, you increased your chance of making the slam from 50 percent to 95 percent. Good concentration and nice play! Isn’t it fun when you can “see” all the hands?
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