after blackwood, I think it is standard to bid next step as trump queen ask, and 6x for specific ask about that suit, 5NT nowadays is specific king ask I think.
Well. What if you do have the queen of trumps and ask about it?, partner is gonna show a negative* and, if the negative happens at the 5 level, you have a bunch of new specific asks at the 6 levels (5NT included, 5♠ sometimes).
Further more, if you don't ask about the queen, and you have it, you can (almost) safely state that your 6x bids are different than the 6x bids after the relay.
It is true that the most common use of 6x bid after a negative about queen of trumps is: I wanna play in this suit because we don't miss trump queen here.
But sometimes it is very obvious that this is not the case.
Further more, after a 5♠/♥ negative, what is 5NT?, having 5NT as pick a slam, and 6x as to play sounds like (almost) 2 ways of biddin the same.
5NT as specific queen ask might work pretty well.
With a spade fit, and 2 ways of 6 clubs asking you could ask about from ♣KQ to ♣J.
Asking directly would mean I need a lot of help (KQ is 7, K is second step, QJ first, rest negative)
Asking indirectly would mean I need slight help (I have the King), QJ is 7, Q second step, J or doubleton is first (second step asks)
One more twist, your asking bids are always on A: your secondary suit (2 suiter), partner's primary suit (if he supported you). So using clubs as asking about A and diamonds about B sounds like another improvement for extra space.
Ok gonna sleep now, will come tomorrow and see if this still makes sense or is just a piece of trash

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