An incredible ending in 3NT

Dlr: N Vul: Nil KQJ10 Q9 7 KJ8632 85 1072 KQ632 Q105 A742 K86 985 A74 863 AJ543 AJ104 9

My partner opened ONE CLUB in first seat, i bid ONE HEART, partner rebid ONE SPADE, I bid TWO DIAMONDS (fourth suit forcing, not to game) my LHO doubled this, partner bid THREE CLUBS, and I bid the 22 point THREE NOTRUMP, all passing.

My LHO gets off to the lead of the S8, RHO wins and plays the D9, DJ, DQ, D7.

T3 is a small heart, I try the nine, King, Ace.

T4 I play a heart to the Queen in dummy. It seems that hearts might be 3-3.

T5,6,7 Three more rounds of spades, as I pitch a diamond from hand, RHO follows throughout, and LHO pitches two small diamonds.

A very interesting 6 card ending has been reached. I have lost two tricks and need to make four of the last six, lead in dummy. If hearts break, as I suspect they do, I have the neccessary tricks in my hand but need a stepping stone.

Dlr: Vul: none none none KJ8632 none 8 K6 Q105 none 10 85 A74 none J54 A10 9

If I play a small club toward my 9, the following can happen.
A) West wins and plays a club, I have to put in the Jack, A1) East wins Ace and gives dummy all the four clubs A2) East wins Ace while I pitch the Ten of diamonds and gives me four red tricks.
A3) East ducks the CA, as I pitch the diamond, but wins trick ten perforce as I pitch a heart and has only red cards and my last three red cards are winners. OR
B) East flies in on the 9 , and B1) plays a club when I make with overtrick, or B2) plays a Diamond, when I win with the Ace, and try the hearts which give me three tricks when they break.