If it takes too much air use a softer reed and you'll find the reed retains more of a bend than a harder one, effectively closing up the opening until it feels right. There will still be a substantial difference though because that softer tip will vibrate back and forth more and it will create a more complex sound with more overtones. The predominent effect will be a brighter sound. A harder reed will dampen a lot of those overtones and will not close up when you use a smaller tipped piece, but hard reeds can be difficult to blow on a larger tipped piece.
Does that help?
Does that help?