If you do not want to cut the keg the best way to connect the column is with the tri clamp and NPT adapter at brewhause. You will also need the O ring or gasket they sell. The other posts are right when they say that it will be difficult to clean. This means that you must make sure your wash has cleared completely before filling the keg. Also, a drain valve is nice but not necessary. You can just flip the keg upside down and let it drain that way. Do this while it is still hot. You will need gloves. This way you can rinse it right away and less will dry and stick to it. Also, this method assumes you are using outside heat such as gas because you would have to drill holes to get an electric element inside. The ball valve is easy to remove with a pair of needle nose pliers. Push the ball down with something to remove any air pressure inside then just grip the thin metal retaining ring with the pliers and pull it out toward the center. The spring on the ball valve is self contained so nothing should go flying. After the retaining ring is removed the whole thing should come out in one long tube. It helps to keep all the little scrap pieces of copper from construction and through them in the keg with the wash when you run it. This helps it to boil better and increases the copper contact.