[Dewmazz]

It's really not difficult at all! It really only takes about a half hour at the most, and that's mostly for setting up "the hardware". When you get used to it, it takes maybe 5 minutes to dump the old yeast, wash the container, fill it up with the new yeast & sugar. However, you may want to add a gas seperator, which helps to reduce "gunk" that you may get from DIY Co2. It's simply an empty bottle between the yeast bottle and the aquarium. see here:
http://www.qsl.net/w2wdx/aquaria/diyco2.html

Don't be intimidated :thumbsup:

And great job John. Nicely done how-to. I think I'll have fun making the bubble counter...