I have two regulators connected to two separate co2 tanks and would like to join the regulators so I can just use a single tank. However, one is left-hand threaded and the other is right-hand threaded (I didn't realize that until today ). I know you can buy the couplers in either right or left thread, but does anyone make them with one of each on opposite ends? I suspect they don't. If not, do I have any other options? I can live with my current setup. I just wanted to clean it up a little, if possible.