My 400
looks more like that 550 in stainless, but it's maroon red. I added a muffler, and I never had Hoover attachments. I had an MD swivel full feature hose. It finally tore apart behind the grip about 10 years ago. I got a Canavac pistol grip in black with only a powerhead switch, no 24 volt unit switch. I either use My Eureka vintage Vibragroomer 1 with extruded aluminum roll, or Vibragroomer 3 double brush stainless roll. Those were the same Beam supplied with their kits.