lowerline, on 2014-November-19, 11:10, said: 4m: Last Train, allowing opener to sign off in 4nt with a minimum4nt: Optional Blackwood, allowing opener to sign off in 5m with a minimum4x: control-showing with serious slam interest Using 4m+1 as Kickback allows 4m as Last Train 4N then controls bid for 4m+1