Right on Dave! Good choice on your 2 horns. Yes, that exact breathing technique is what changed it for me as well, that's why I made that lesson… it's the most important thing you can learn to start producing a good tone on your saxophone!
You had a sock in your bell, I sounded like a sick duck! It all starts to change when you start doing things the right way. Took me 2 years. Learning the notes is easy, it's the other "stuff" that can take some time and be a little frustrating at times.
There is another lesson or two on the way that will help even more with your tone and I look forward to posting it here (Lesson Announcements) when it's ready.
