break angle

How to secure proper break angle and prevent strings behind headstock from ringing (sympathetic vibrations)? Simple, use a simple cheap capo like this:

I see lots of posts from people who move a set of strings from one bass to another, multiple times in some cases. This seems to be pretty common among flatwound users. I also see posts where people emphasize the importance of getting a good break angle of the string over the bridge. This seems...