I have been back at the cornetto again. I'll write a little about it. I think one of the most rewarding aspects is being able to feel the instrument centering the tone itself, which is much subtler than a trumpet. One thing I have noticed between an acorn type and a trumpet type mouthpiece, is that the tone for the trumpet type seems much more subdued and mellow, which I wasn't expecting. I expected the smaller mouth piece to color the tone more. Anyway, I think practicing a trumpet mouthpiece on a cornetto is good tone practice for the trumpet, I can hear more of the sounds the lips are making. One thing I am wondering is if there are any (easy)song books specifically for cornetto.