In game situations (2/1,4th suit) I like to invert the meaning of Nt, so that 2NT is stronger than 3NT.so with this hand after 2D I would have bid 2NT showing 14+ and pard could ask for strength with 3C..replying up the line with 14-15.16-17.18+ and after ascertaing 32 HCP would have tried for Slam. does anyone think this has merit..I call it saab (slow arrival asking bid)