I've been playing on a Rousseau NC3 alto piece for a few months now and I really like the sound that I'm getting out of it on my YAS-62. However, I've noticed that a lot of people that use the Rousseau New Classics are using the NC4 facing. One problem I feel that I'm running into with the NC3 is that, especially when using vibrato, I tend to choke off the notes, especially in the lower register. I know this is largely my own problem, but would moving to a more open facing help in this regard? I'm using Vandoren Traditional 3.5's right now. Mind you this is for classical playing.