Suzy, I say don't worry about those points; they'll get better with practice (you'll figure out your own little tricks for getting it). I have a "clumbsy right hand" because of a stroke and I've learned to accept things that are not what I used to call perfect. It's good to want it done well, but if you're going to stress over it.... you know -- it's not worth it. It kinda defeats the purpose of having a hobby. Relax and move on. :wink: Good luck.
I want to try the tube quilting, but I'm not sure I have the right ruler.