Gazzilli in combination with Kaplan Inversion

Conventional 2♣ bid by OP after 1♠-1NT  and 1♥-1♠ shows natural bid or balanced hand 14-19 or any strong hand 17+, except 6M4x, 17+ for which the bidding goes 1M-1NT-2N

1♥ - 1♠    =    0 – 4 ♠, 6-11

1♥ - 1NT    =    5+ ♠, 6+ HCP

1♠ - 1NT    =    6-11