This confirms my suspicion that my intonation issues with the Sinfonico were less the instrument and more my weak embouchure recovering from a decade and a half of atrophy. Doing an hour a day of highly structured practice most days, and it's helping. :) Lots of long tones, lots of scales, transcribed a bunch of stuff for me to play along with, too, including "Feed The Birds" from Mary Poppins, which is my favorite.