Originally Posted by bkpr
So I'm not sure opening my stance would make the right difference. In theory it would make me curve the ball to the left even further (assuming everything else stays the same).
Unless you want an extremely curvy slice down the T (in which case, you need to keep the stance closed and experiment with the toss), then you would also have to flatten out your swing and open the stance. It might not be a problem of simply changing the direction in which you hit your serve, but the way you actually hit it.
To clarify, are you asking about a serve like this?