One bit of warning for you folks that have the Swiftech Storm block. This may be common or perhaps it only happened to me. However, I'm guessing that this is a common thing with threading a plastic barb into a hard material. When I received my Storm block I threaded the 1/2" barbs in and then took them back off and noticed some very fine plastic string which I can figure was a little bit of the plastic barb threads that came off when threading it into the delrin top. These fine strings if not removed will clog the tiny jets in the Storm's mid-plate. The string are easily removed with a pair of tweezers and a can of compressed air. Just check your Storm block for the stringy stuff before you put your WCing system all together.