Originally Posted by RJYU
Use the diabolo. The spelling is actually diabolo by the way. It does relieve a lot of pressure on the gripper, and it protects the string as well by not needing the gripper to put so much pressure on the string to keep it from slipping. The friction caused by wrapping the string around the diabolo is what lessens the force needed to be placed on the strings by the gripping plates.
Thanks for the spelling correction. I see where it gets it's name now. Duh!
I can see how use of the diabolo will lessen the force with which the linear gripper closes on the string. Since the diabolo is helping pull the string the gripper it is not seeing as much linear force from the string & it doesn't close down as tightly.