Thanks for the videos, Mike.
Here are a few thoughts from folks here at Bridgewater who tested the CX-15 including on their own home carpets.
On level loop glue down, heavily soiled carpet in a print shop, the CX-15 out cleaned even the rotary extractors we compared with it. It really shines on heavily soiled commercial type carpet. On deep pile with very heavy soil, the lower pressure on angle of spray from the residential bar did not get as deeply into the pile. There was some soil left deep in the pile that was removed by a rotary extractor, but it took a few slower passes with the rotary to out clean the CX-15 on this deep soil in thick pile.
When doing residential cleaning on cut pile the crop circles can be diminished but are difficult to prevent totality. However I have found (as have others who used it residentially) that the crop circles disappeared when the carpet dried or was groomed. This is not to say that holding the trigger on and not moving the tool will cause a more permanent circle – it will. But starting to move back as you pull the trigger or lifting the front, triggering, the putting the front back down and starting back pull all in one motion will very much diminish circles. When I cleaned my own carpets it took me a few tries to get good at this but then I cleaned a good volume of carpet with no remaining rings.
I cleaned two different types at my house. The frieze/shag had no circles. My short cut pile did have some but they disappeared upon drying. During the first second that pressure is put to the jets, the bar is turning slower, the jet spray is narrower and thus can leave a small circle but it is NOT fiber damage (unless they leave it in one place). I speculate that the carpet is slightly more damp in the starting ring.
When they cleaned XXXXXX’s carpets at home they also worried about the rings but the rings also disappeared on drying. He had several types of carpet in his home.