Hi all I don't think these have been shown before, so I thought I'd post them here because they look good! http://cgi.ebay.co.uk/Brand-New-CO2-Mix ... m153.l1262. I don't know what this would be like although it looks interesting (but big!) http://cgi.ebay.co.uk/CO2-Diffuse-React ... m153.l1262. Hmm, these look familiar. Can't think where I've seen them before though . To be fair, it's a fairly good price-dosen't cost much less for a DIY model.