between 1440 - 1522, Khoung tried the pinch test again, removing all of the array of tubing. During this test, the overall noise in p[ref].11b was significantly less, indicating that part (but not all) of the p' problems still are tubing related.
At 1525, he sucked on the reservoir and reconnected the (entire) tubing. It appears that the tubing has a leak with a time constant of about 10min. This was actually desirable(!), but indicates that we still have some sleuthing to do.