Hi guys, let me just start by saying i am relatively new to brewing since i haven't brewed a beer since 1984 but a few weeks ago a friend of mine gave me a Kingkeg he got from a house clearance, my question is, on the top is a screw thread, i think this is for a co2 bottle, is this needed to make a brew or can i just use a 40 pint kit & brew it as you would in a fermenting bucket then syphon off & bottle ? also, back in the 80s kits used to stress not to use plastic bottles, i disobeyed that rule & used a well know cola brand to bottle my beer in, is this advisable or are there any disadvantages to using plastic as opposed to glass ? I am gratefull for any advice.