Gary and J. Jericho really hit the nail on the head. My suggestion is call Jason at Monette. He really knows his stuff. I've used both the B6 and the B4 mouthpieces, and you coming from a Stork #2, I think you should be in the B4 series. My personal experience has been that the B4S has a comfy rim with little to no bite and a deep cup. If you have strong chops, it's a wonderful piece. If you like/need more bite, the B4LD works great.
I just think you overshot your reduction. Call Jason on Monday morning. Email him tonight.