My comment about puppet Stayman concerned 3C over 2N and not 2C over 1NT. Opening 1NT with a 5 card major is a matter of preference, style and risk tolerance. 2NT openings are a different situation. There are quite a few instances where opening 2N with a 5-3-3-2 is considerably safer when playing puppet Stayman than opening 2C with 20-21 points and opening 1 of a suit with that 20-21 points has its own issues such as having your 1 bid passed out or over-called leaving you without a reasonable second bid. That said, I do not wish to prolong the discussion and do not plan to reply further.