I bought a used kegerator back in July and it's worked like a charm. The only issue I've had is that I'm still using the original beer line. I have my doubts as to how well or often the original owner cleaned the line. Long story short, I tend to get some beer stone in just about every pour. I know the easiest thing to do is just replace the line, but I've had a hard time finding the correct size and the process to replace it looks a bit tricky (not sure if I have to right tools to do it). I use the micromatic clean flow (i think it's called) powder solution to clean the line. Is there something better I should be using or should I let the solution soak in the line for an extended period of time to get rid of the stone? It doesn't seem to be affecting the taste of the beer, but it is unsettling to have so many floaters in my glass. Thanks!