I play precision with my regular partner. We know MeckWell play 1D->2H = 5S4H, less than invite 1D->2S = 5S4H, invite but we have not try it. Recently, my partner suggest: 1D-> 2H=5H4S, invitational hand 1D-> 2S=5S4H, invitational hand for 5H-5S hand, shd bid 2H first. for 64 major, may use 2H/S also. So that 1D -> 1S -> 1NT -> ? 2C=check back 2D=to play 2H=non-forcing 2S=6+ cards Spade, non-forcing & 1D -> 1H -> 1NT -> ? 2C=check back 2D=to play 2H=6+ Heart, non-forcing 2S= 4+S, reverse, game force. Any comments?