Paul
I know that some of the guys have had some success, but I found it overheated and became "unwilling" to run on c/t's, due to the high resistance.
This was using bonnets
On low profile domestic, where it might only get 15 - 20 minutes use it works fine, but Oreck do make it clear, that it's rated as for domestic use only.
Using with Charleys would have less resistance, so might work better, but it 's really just a little domestic machine, rated for " light use "
There is a genuine commercial o/p machine which is imported from the USA which I think is 14 or 15 inch, there fore lighter than the 17 - 20 inch " back breakers "they are sold by a gent who banned me from his web site " forever ".............for reasons unknown !!!