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Title: good stuff
Review: not too much of work as others put it. A Must have if you use their filter. One thing the instruction said at the end that both clean and dirty sides show red evenly. I dont think you would get red to show up evenly on the clean side while you only apply oil to the dirty side, unless you risk over-oil it. With the amount of recommended oil, probably can only get 20% of clean side to show up red.
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