Get Balls, to sit on Rope

[Renman3000]

Hi thank you, 
So regarding the "sitting on a rope"... this is, at the end of the day, a 2D function. I mean there can be no Z movement.

So, I am a little confused. 

--- can I either use 2D physics with Obi or can I limit/turn off Z positioning?

---- just an idea... 
Could I set up a level in Unity 2D physics. This level is a room, with walls.
2D Circle Colliders and Rigidbodies flood the room and forces are applied. 

--- Could I then, in the background, match the 2D physics of that room but with Obi Colliders, 
Then, have an Obi SoftBody per 2D Circle. The Obi Softbdy would then match the position of its associated 2D Circle? 

 This would likely create the illusion that I would want. 



Or, as mentioned above, is there a 2D method to Obi itself? 
Thank You!