I'm not the biggest fan of Quincy's quality control these days. For the outrageous premium they charge, they send out far too many leakers and QC fails. My old man currently has a QT-5, the QT-54 is, in my opinion, not something I'd pay the Quincy premium for. The QT-5 seems a much better machine, but still a large premium for the name and still poor QC.
Made the mistake of ordering a QT-54 before, drop shipped from Quincy. Those idiots sent a 60 gallon model instead of the 80 gallon that was spec'ed. Then the 80 gallon showed up and had a cross threaded inlet with a massive leak past the ruined threads. As a mea culpa, after two back to back f*ck ups, they sent a QT-5 as the replacement 80 gallon unit. Nice gesture on their part, but of course on arrival the QT-5 had defective check valve. This after they claimed they had their team go over it with a fine tooth comb to avoid a third f*ck up. Top it off, their 3rd party tech that they sent out was reluctant to replace the part and denied it was the problem. Funny how it fixed the problem when he begrudgingly replaced it. After all that hassle, yeah sure, the QT-5 is a nice machine. Worth the hassle? Absolutely not.
Sorry, Quincy's QC is a joke and to pay the kind of premium they charge for their name and their blue paint is not something I'd ever be willing to do with my hard earned money again. To each his own, but I won't be their customer again until they figure out how to ship the correct, working compressor without needing 3 attempts (4 if you count the tech visit) to get it right.