Ideally, from a scientific perspective, four sets of continuous (rather than discrete) measurements should be recorded during gas-release experiments and core recovery for each successful PCS run: (1) time since core collection, (2) pressure inside the PCS, (3) temperature inside the PCS, and (4) incremental gas volume released from the PCS. These information sets were not collected on Leg 164 for three reasons. First, shipboard redesign of gas-manifold systems and placement of the PCS in a confined location prevented automated and continuous data collection. Second, the PCS was not equipped with a pressure transducer to record pressure inside the tool during core recovery. Third, the PCS was not equipped with a thermocouple or probe to determine temperature inside of the tool at any time. Of additional use would be a controlled temperature bath connected to the mounting sleeve, and a valve for controlled gas release. Two complete manifold systems and mounting sleeves should be available for cases where PCS cores are collected within short time intervals. Future drilling proposals that include plans for using the PCS should consider modifying the instrument prior to sailing such that the above improvements can be made. The most useful and successful set-up for Leg 164 operations is shown in Figure 1.