Follow the Instructable here: http://www.instructables.com/id/Air-Powered-Soft-Robotic-Gripper/?ALLSTEPS. On step 1, print whichever one of my molds matches up with the main gripper mold that you printed. In between step 3 and 4, pour the silicone mix into the mold. Then, SKIP step 4. During step nine, instead apply silicone on the flat side of the product of my molds, and press that to the open side of the gripper itself. Let cure.