Bidding a hand from the PABF Championships

I  was watching a bit of the PABF semifinal and I noticed that neither table reached an excellent slam.  I was wondering how I would bid it.  Do you ever do that –  bid both sides of the hand with your system, trying hard to be honest, and see what you would do?  Here is the hand along with my self bidding.

The hand has been rotated for convenience and North is the opening bidder with no opposition bidding.  I would open 1NT (12-14).   With 4-3-3-3 the question is do you use Stayman as South.  You do have an 18 count with prime cards and slam is certainly possible.  Partner mayhave some shape so I do like bidding 2D game forcing Stayman.  Partner bids 3H showing 4H and you bid 2NT to ask for more information.  Partner bids 3S and you now know he is 4-4-3-2 or 4-4-2-3.  This is great for you so you try a cuebid of 5C and partner bids 4H denying a diamond control but showing more than a minimum.   How likely is slam now?  Partner might have QXX of diamonds since he denied a diamond control or XXX.  How about this hand

KQXX KQXX QJX XX

Slam would be on a finesse.  Can I come up with 13 points consistent with the auction where slam is not very good?  Qxxx KQXX QJX KX.  That will do it.  The key to the hand must be decent spades.  I think 5S should ask that question.  Since partner has already denied a diamond control and we have shown controls in the other suits.  This might be our auction

In my dreams.  In one room North didn’t even try for slam after he knew his partner had 18-19 points and four spades with him.  What do you think?