Dutchdwang

with my partner: A1: 1NT-2♣ 2♦-2♠ 4♠ B1: 1NT-2♣ 2♦-2♠ pass A2: 1NT-2NT pass B2: 1NT-2NT 3NT(pass) is a close decision, think i would raise to 3N

If you play 2/1 F1, I guess 1♠-2♦-2♥ is forcing, otherwise it seems unplayable to me. Also 2/1 GF is easy in what's forcing and what's not. You (almost) never have misunderstandings about that.. what i particulary hate about 2/1 F1 is: 1M-2m 3M with a reasonable 14/15 count and not a really good suit, partner has to guess a lot now, you can miss game/slam easily or end up in wrong game..

I would never bid 3NT, we don't have any source of tricks.. I would pass, and try to score + this way..