I bought FilterLinc 10A units a few months back and they work great. They do not have the plug turned either, but they are probably better units from what I've read (I don't have any XPPF, so I can't say from personal experience). Turns out, that guy just put several more on ebay this morning. They were $10/ea last time so $15/ea this time kinda sucks. But, it's better than $30+s/h and it's about the same as the XPPF at this point.