Attaching to Rope, Jitter.

[idmah]

I've been looking at several solutions to connecting something / object to a rope. 

I ended up using this: 

Code:

pathSmoother = ropeComp.GetComponent<ObiPathSmoother>();
ObiPathFrame section = pathSmoother.GetSectionAt(ropePosition);
 m_Character.transform.position = pathSmoother.transform.TransformPoint(section.position);

to move the character to the rope position.  But my rope is attached to a boat and I'm getting a lot of jitter, moving forward and back on the rope, think it's because of stretching. 
I also Tried LateUpdate, FixedUpdate.   But still pops / jitters ups and down the rope. 

Would Pin Constraint be more stable?  
I couldn't find any code examples. 

Maybe because I don't understand how to read the doc correctly - Hahaha!
any ideas welcome Thanks!