i had the same problems but i came up with a solution of my own it works fairly well. hope it helps someone.
this is the code:
[attachment=2:3s3el9if][/attachment:3s3el9if]
here is the pics of it working:
[attachment=0:3s3el9if][/attachment:3s3el9if]
I used the physics characteristic on the orange bar that attaches to the character, and the blue square that that holds the orange bar in place.
here are there behaviors:
[attachment=1:3s3el9if][/attachment:3s3el9if]
there are still some graphical kinks to work out like position and animation, but it does the trick technically.