It's the same one as the Greeks use on their Scorpion (see pic).
I don't mind the extra line that much, only on long beam reaches with gusty conditions it can be a bit tiresome.
In medium winds and upwards I do feel it is more precise and controlled than a 8:1 or 10:1.

[Linked Image]
https://i.vimeocdn.com/video/668113784.jpg