Just to add to this if anyone is interested in hearing - I thought I'd save some cost and make my own wort-chiller after seeing a few youtube videos and looking at pictures of the ones they sell. I can do that, I think. So I went to home depot (I'm in Canada) looking for 25-30 feet of 3/8 copper tubing, expecting to pay in the neighborhood of 30 bucks for it. It didn't quite work that way.
My choice was between a 20 feet length of 3/8th ($35 +tax) or a 50 foot length of 1/2 ($56 +tax). I hmmmed and hawd a lot. I walked out with the 50 foot 1/2 inch, tubing, fitting, clamps and a cheap pipe bender for $100 all in. I wondered like hell if I bought too much.
When I got home I called around to see if there was a better fit/deal around and everything else was astronomically more expensive. I'm looking forward to assembling it.
Here's the keg (if pictures work on this...)