Last year was my first on vacuum and I installed gauges at the top of each run (3/16 straight to the pump) to see the vacuum accurately. What I experienced was that initially the gauges would read correctly, but eventually they would get "stuck" at a reading, never to return to zero again. I assume this is from ice damage, but it happened on the cheap "empty" gauges as well as the more expensive filled gauges so I'm just looking to see what experience others have had with this situation.