Need help with a noose contraption

[SAC020]

So, I made this contraption as a noose with collision: https://www.dropbox.com/s/w31qhdf3g8uu1ss/noose%20v1.nif?dl=0

 

It kinda works, with some workarounds: https://www.dropbox.com/s/6tgokavyscs3tjl/rsz_screenshot352.jpg?dl=0

 

The next step is that I would like to add swing to it, like the mutant meat bags swing. But I don't know how. So, any help would be greatly appreciated (by myself, probably not by the NPCs that happen to end up in it :) )

 

Thanks!