Good price on that draper reg mate, any welding reg you buy will need a needle valve similar to which i put a link to earlier in this thread, as we need to control our co2 a lot more precise than when used for welding.
Finally got all the bits and pieces together just wondering if it's possible to reduce tubing sizes? The aquarium CO2 tubing isn't big enough to go onto the output of the regulator (which looks to take welding sized tubing)
So glad i stumbled across this thread! i would rather pay a couple of extra quid to have a neat looking co2 system then a gaffa taped fire extinguisher!