Found some images of our Kenmore 600. You can see I made a custom adapter to put a standard central vacuum style hard floor brush on the big diameter Kenmore wands. I made it from the swivel neck of another Kenmore power nozzle and the bottom of a bent up button lock wand cut off, glued and riveted into the cut down swivel neck. The 600 is a really well made and well thought out vacuum. The attachments are really nice and the Pet Powermate is so much better than an air driven turbo brush. Materials, fit and finish are miles ahead of any Progressive model. Kenmore hit the nail on the head with this one.
The vintage Panasonic next to it might be the next best vacuum to that Lux 1R D820. Same power, very nearly as quiet and just as well built. Another all time great vacuum.