My wife and I continue to play Brass:
http://www.bridgematters.com/brass.pdf
The vast majority of the time it is 2
♣-2
♦(waiting)-2NT(18-19) and then 2NT system on (since transfer to a major will have some values or shape opener can super accept or try 3NT)
The 2
♣-2NT and 2
♣-3X sequences are so infrequent that I would dump them at this point, and by using opener's 2NT rebid as artificial GF after 1X opening we have found it is best for all unbalanced suit opening less than a game force open the suit
Thus the simplified version of Brass could be:
2
♣: 18-19 balanced OR 22+ balanced OR any GF
After 2
♣:
2
♦: waiting
-- 2
♥: 22+ balanced or 4+
♥s GF (if exactly 4
♥s unbalanced has 4
♠s or longer
♦s or 1-4-4-4 exactly)
-- 2
♠: 4+
♠s GF, now 2NT shows exactly 3
♠s
-- 2NT: 18-19 balanced, system on
-- 3
♣: natural GF, not 4
♠s
-- 3
♦: natural GF, no four card major
2
♥/2
♠: five card or longer suit, max of 4 points, no ace
3
♣/3
♦: six card or longer suit, max of 3 points
2NT: 5-5+ in majors, max of 4 points, no ace
After 2
♣-2
♦(waiting)-2
♥(bal or
♥s):
2
♠: no five card major, now 2NT is 22-23, 3
♣ is like stayman and shows 24+ balanced or both majors, 3
♠ is 5+
♥s and 4+
♣s
2NT: five or longer
♠s, 4+ points
3
♣: 4-4/5-4/4-5 majors
3
♦: 5-5+ majors, 4+ points
3
♥: five or longer
♥s, 4+ points