I can see Martin and I are going to be allies around here going forward.

Thanks Jacko, at the moment I am still cleaning upholstery using HWE but I am looking at other options including a 'by hand' service using pre-spray then upholstery mit approach (I'm just waiting the 'traditional' remarks on that comment!)...... the website as it is up at the moment is really just a prototype / test I was playing around with. As others have pointed out I think it still has the Extracta logo on at the moment!

Here's a one for people; the skeptics are welcome to dismiss this as propaganda but for anyone that saw my other thread where I used too high a PH, without acid rinse on my mother-in-laws carpet, leaving it hard and with some blue blotchy areas; I have just used (a lot of) Envirodri sponges on it, agitated it with the GEN4, gave it 40 minutes and then the vacuum from hell - complete result. All blue spots completely gone (I put a pile of sponges on each and hand brushed with a Tampico before using the GEN4), and the brittleness in the fibres has also gone. It's as though the sponges have conditioned the fibres beautifully.
I'm not being evangelical about 'dry' in saying that, just proves that every problem has a fix. Gospel truth though, the envirodri has really fixed the issue.
