High speed fights. They're hard, unless you know what you're doing. I'm especially speaking of blade battles.
How is it that you do the 180 Degree Turn when you're quick boosting?
I've tried several times, but it just seems to happen at random for me.

It's not that hard. You have to side thrust while turning to the side you want to spin around. The better you're mobility the more you can turn around. It won't be a perfect 180 but it'll get the job done.