I just came into a 25 foot coil of 1/2 copper tubing. I have a 2foot CFC I made with 3/8 coil I have a keggle brewstand I was thinking of either making a immersion chiller or making another cfc with 1/2 instead of the 3/8 but not sure if it would be too bigh for the hose any ideas? what would you make if you had a 25foot coil?