I had a Polaris 65 for my 28' round and I was throughly disgusted with it. At the end of each season, the inside mechanism would wear out. It happened even with the pressure adjuster wide open. Some people have luck with it, other don't. I eventually sold it on ebay and got almost all my money back. I bought my there brand new for 149.00 w/free shipping. Good luck with what ever you decide.
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