Recently installed the V.2 upgrade in situ and it killed my lower back. Entirely worth it. I have my 34 set to timer mode at a 10 second advance every 2 hours on a 100 and the water has never been so clean. I expect the fleece roll to last at least a couple of months, but will have to incrementally decrease the feed time as the rolls vary in diameter. The very best part is not worrying about running out and having to manually feed a new roll through encrusted rollers. Anyone having issues with sensor mode?