Power supply for the 6400M. I Have a astron 70 Amp power supply. I got it in a sale years ago and works like a champ. I have multiple radios plugged into it thru a rigrunner 4008. My question is should I get a power supply just for the flex 6400M. The only other radio that might be on is a 2 meter/440 radio into the 70 amp supply. My amp is on anther line. If yes, which one would be better for the flex so that it gets what it needs.