He missed the dryer. Of course you can't go wrong replacing everything, and not surprising a Vendor would recommend that. I just went through mine. Compressor, hoses, and dryer. That's it. I have yet to try it though. My original hoses looked good, 74' with approx 50K miles.
I think it also depends on how much you plan to use it. I will use mine sparingly, so I probably didn't need the hoses, and don't need a forever solution.
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