I had to service one of these for a customer this week - thought it was a normal lime green DC04 at first but had 'Constant Max for Commercial Use' on the cyclone.
As I understand it, it was Dysons attempt to join the commercial market but they were never really a hit.
Was nice to work on something that Dyson never really made many of - anyone else worked on one?
This is where I find out most refurbers have and they weren't actually that uncommon