Cyberyeti, on 2012-October-09, 03:18, said:
In fact, spades agreed, over 5N:
6♣ A/K 6♦ asks
6♦ A/K and extra length 6♥ says bid 7 with A
6♥ Q
6♠ 0
is probably optimal
I am sure you noticed that this is functionally identical to Scheme 2 in Post #9. Only the order of questions asked (honour type versus extra length) has been reversed. There is a very small theoretical advantage to sorting by honour first since this allows you to show 2 extra cards with an ace but this is really minimal. It is more a matter of how you find it more logical to split initially. One change I would consider making with your scheme is to reverse the 6
♣ and 6
♦ responses - that would allow you to do the same. An alternative would be to keep it the same but make a 6
♥ bid after ... - 5NT - 6
♣ - 6
♦ show something like KJT. That might be enough to make up for not having the queen...