Adapting Conventions to Precision (Part 1)

Today I was talking with Cam Shunta about our system over a precision 1D opener, and I had recently been given a system over 1D where 2H shows a 10-12 Bal. w/o 4 Card Major and opener could bid his hand accordingly or decide where to play the Notrump... with 2S being a relay to 2NT to right side the contract. I then told him that I have developed a relay using 2S, but since we are playing precision it really didn't do much good... We started playing around with ideas, and he came up with a brilliant one: Use 2H as a size ask, so that we could still get out in 2NT with the ugly 11 opener opposite a 12 count. Everything followed from there... We could now also put slam hands into the 2H bid, since with a balanced 19 count, you need to know whether partner has the balanced 11 or the maxed out 15. I figured out a basic structure, which I will add to later on, and everything fit beautifully! So, for all you precision players out there, here is the structure:

1♦ - 2♥ -
-----2♠: 10-11 HCP
--------2NT: Signoff (10-12)
--------3♣: Stayman (18+)
--------3♦: Signoff (10-12)
--------3♥: 5+♥ (18+)
--------3♠: 5+♠ (18+)
--------3NT: Signoff (18-19 HCP)
-----2NT: 12-13 HCP
--------3♣: Stayman (18+)
--------3♦: Signoff (10-11)
--------3♥: 5+♥ (18+)
--------3♠: 5+♠ (18+)
--------3NT: Signoff (12/18)
-----3♣: 14 HCP
--------3♦: Stayman (18+)
--------3♥: 5+♥ (18+)
--------3♠: 5+♠ (18+)
--------3NT: To Play (10-12)
-----3♦: 15 HCP
--------3♥: 5+♥ (18+)
--------3♠: 5+♠ (18+)
--------3NT: Signoff (10-12)
--------4♣: Stayman (18+)
-----3♥: 5♥ 6+♦
--------3♠: Size Reask (18+)
--------3NT: Signoff with Double ♠ Stopper; 2♥ and 3♦ (10-12)
--------4♣: Cuebid (18+)
--------4♦: Minorwood (18+)
--------4♥: Signoff (10-12)
--------4♠: Kickback 1430 (18+)
--------5♦: Signoff (10-12)
-----3♠: 5♠ 6+♦
--------3NT: Signoff with Double ♥ Stopper; 2♠ and 3♦ (10-12)
--------4♣: Size Reask (18+)
--------4♦: Minorwood (18+)
--------4♥: Cuebid (18+)
--------4♠: Signoff (10-12)
--------4NT: 1430 for Spades (10-12)
--------5♦: Signoff (10-12)

Most of this is self explanitory, however there are a few clear advantages at Matchpoints and even at IMPs. First of all, you can stop at 2NT in many auctions where it would otherwise be very difficult... In addition to getting to 3NT whenever you have the values to be there, with no guesswork. It also gives you a scientific way to ask about size below 3NT when you have a slam invitational hand. Along with all this, 2H is a bid so rarely used anyway, that it's not much of a loss, and a big gain. Responder's NT ladder with no 4cM also changes: With 6-9(Bad 10) responder bids 1NT. With (Good)10-12 responder bids 2H. With 13 HCP responder bids 2NT (With 10 opener passes, and anything else, opener bids on). With 14-17 responder bids 3NT. Finally, with 18+, responder starts with 2H and rebids accordingly (I have yet to define the 4C-4NT bids in many auctions, and I will put them in when we figure out what they should show.) This is one of a few system modifications that we have made to accomodate limited openings, more to come later.