Wife and I getting into duplicate bridge after being casual and infrequent rubber bridge players. We were taught many years ago a 12 HCP,4 card maj system opening higher of touching and lower on non touching. With 15-17 one NT, limit raises with 4 cards in support (2 raise = 6 to 9 hcp, 3 raise = 10-11hcp and 4 raise is weak with 5 to 6 cards in support). Also 2 NT is 4 card suppt with 12 HCP and forcing. Since we are at a crossroads and want to devote serious time to study and play should we continue with the 4 card system as our foundation or change to something else like sayc. Notice not many people use 4 card maj here in Calif. but that may be to our advantage. In any case has the 4 card system proven to be inferior and if so what is a better alternative? Thanks