Hello- We are using this gripper to grip on the I.D. of a steel part and noticed if we get too far out towards the end of the gripper finger we see a buckling of the linkage, and drop the part. The data sheet I have for the gripper shows an image of it being used in this fashion but the specs do not mention any capacities or limitation of using it this way versus griping externally. Are there any limitations? Is there something we are doing wrong? Thanks in advance for your help.