Hello again.. Due to an omission on my part I inadvertally did not mention the Pl network was for a monoband 160m amp using a 3cx3000a7 some would say 3X3 hi..What size copper tubing is recommended??I have a 50' roll of 5/16 but I almost think thats overkill I'd like to know what the GURUs recommend..thanks John K1GUN...