As a teacher, I tend to steer my students to the 10 1/2C or 7C rather than something close to what they already play. In my early years, I went through the Bach "3D" thing, and might still use one on a modern piece in an orchestra setting that requires a loud, shrill piccolo part, but other than that, I use the 10 1/2C (equivalent) for everything else. I find that most folks have problems when playing same rim/shallow cup configurations. Shallow cup is not usually the way to go on these creatures....not if you want a pretty sound anyway. Smaller rim with a cup-shaped (not funnel) cup seems to work better in my experiences of observing so many others. Also, keep in mind that the air stream is so different for the piccolos than for our big horns. You have to use your "head voice" type of feeling and airstream, warm and focused, to sound beautiful on the bitsy trumpets. That being said, it really is what YOU, the player, are comfortable using. Leon Rapier played a 1B on his piccolo and sounded great. Different strokes for different folks.