Well, it works with any items.
Here is sample project:
https://www.dropbox.com/s/8ty9wptbvh...000hz.zip?dl=0
And here what you should get:
Right drag wiggle a bit (a bit weird), but left drag really gives the impression the points are moving (completly wierd). I assume these are just visual issues, though, they are a bit disturbing. Having fix points would look more solid.