Hi I've been looking on eBay to get a pressurised CO2 system. One question I have is whether to get a diffuser or a reactor. A diffuser seems cheap but apparently can break particularly under the pressure needed for a 4x2x2ft tank. A reactor seems more suitable but is quite expensive. I'll probably end up getting one of these: http://cgi.ebay.co.uk/2kg-Co2-Fire-Exti ... 35a7ba8df0 And one of these: http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 3364wt_941 Assuming they're deemed good quality at affordable prices??? I really need advice on the diffuser or regulator though. Thanks!