I now have received my vols. 4 and 7. I was happy to see instruction on flutters, however, when I put my tongue to the roof of my mouth, I can still breathe with no problem, so I'm not getting that vacuum effect to create the flutter. After experimenting, it seems to work for me if I jam most of my tongue back and up to close the air off with it and my soft palette, and it makes creating the flutter easier, but not automatic. Am I doing this correctly, or what am I doing wrong?

And shimmies, oh, they are a fun dance staple - however, it is going to take me forever to get them up to speed. I am quite a large woman and there's a lot of "reverb" happening. I guess the best thing I can do is to keep drilling shimmies slowing, ever increasing the speed.