I just made a wort chiller. I used 20 feet of 3/8 inch copper. Wish I would've used 50, but this will work. 8 feet of 1/2 inch clear tube. What is unique is I connected it with a pond water pump. This will help reduce water and cool it quicker. I plan on putting my kettle in a ice bath in a cooler. I will put the water pump inside the iced water so the water will be very cold the water will return back into the cooler. This was very cheap only about 45$ total. I can post pictures and instructions if anyone is interested.
Cheers
Cheers