A load-lock system which includes a chamber housing and a capacity changing system for continuously changing the capacity of the chamber housing. A drill is then passed through the hollow sleeve removing disc and bone in preparation for receiving the spinal implant which is then inserted through the sleeve. The bladder may include one or more chambers, and if more than one chamber is formed, each chamber can be arranged at a different location in the seat portion of the seat. The patterning exposes regions of the substrate between the ICs.