Thanks for your comments. About the infrequent 2♦ response, well, not really. I guess i feel dishonest whenever i talk about hcps, and truth is we always respond 2♦ with an ace and quite some 5 hcp combinations, as long as they've got some nice feature or controls. Thing is, even after 2♣-2♥, we're usually in game and there's a real small number of signoff sequences. All balanced and minor suited hands are GF (and its really hard to stop in 3♥), and virtually our lowest contract is 3♠. About the positive responses, we just don't like using them with 5minor and 4major, and i don't think we're in a minority here. (Usually, 2♣-3 of a minor needs a 6 card suit. It drains so much bidding space away!) Something i didn't write down is that we play 2♣-2♦-3NT/4♣/4♦/4♥ as 4441s with the singleton in the inmediate suit. (2♣-2♦-4♦=4-1-4-4), so, if opener has three suits, he usually has a void. Now, i really like both of these. About 2), well, you're so right. I guess i never thought about what i was losing, but now i can distinguish between a semibalanced 6 card suit and something really unbalanced. About 1), well, you're so right. We actually considered control showing responses a long time ago, but their biggest failure, was, as you note, the 22-23 balanced hand. Thing is, what do you do next? Our model was an old roman-based asking bid based (similar to 1♣ precision - positive response) played by some older folks over here, which i guess can still work with some tweaks, but is still incredibly space consuming. (a new suit asks support in about 7 steps, that range from single-void to HHxx+) Are there other structures out there you're familiar with? I don't think going all natural can be that succesful over here. I really liked Martelsby responses, which went: 2♦: 0-1 controls. 2♥: 2 controls. 2♠: Positive suit response equivalent. 2NT: 3 controls 3♣: 4 controls, etc. I didn't find much else about their methods, however. Thanks a lot, anyway. I'd be awesome if i could get some other links/ideas. Not sure about that, but it is better than alamiro's. :lol: I think there are some heavy quote issues on this one.