G’Day Mike, I can play the same range with all of my mouthpieces but the workload and sound changes. Being a guinea pig to my own ideas, I found that I could work down to the mp I want for lead that I never used to be able to play, the Bobby Shew marcikeweicz 1.5, I was on the 2 for years and I don’t like the 1 even though I can now play it fine. As Bobby said to me years ago “not everyone wears the same size pair of shoes”. Find what is comfortable and sounds good for the job you need to do. Cheers