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Title: piece of junk
Review: I also got one with the serial number beginning with w14.. I turned it on an it ran for about 5 seconds and just stopped. I put in another gear and turned it back on again and it did the same thing. After reading a previous review about the w14 serial numbers being the old plasic housing units i checked and sure enough that is what it is. I think these are the old ones that have been returned before and amazon is dumping them. for all of you that bought these check your serial numbers and if they begin with W14 you need to send them back.. they are junk.
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