It seems like since the last time I looked at Quincys they have come out with the QP series. The QP series is also pressure lubed like the heavy duty QR series, but what is the difference between the two?
QP:
http://www.quincycompressor.com/qp-1.html
QR:
http://www.quincycompressor.com/qr-25-1.html
QP:
http://www.quincycompressor.com/qp-1.html
QR:
http://www.quincycompressor.com/qr-25-1.html