So I have decided to purchase either the 4Al or the SM4, now the specs are practically the same. I don't have the chance to go somewhere to test out these two mouthpieces, so I was wondering what everyone thinks of the two. I currently have a SM3 but I am starting to think it is a bit too big for me. I have not had a chance to play any of the original wicks. Any kind of pros or cons or even details would be greatly appreciated.