I HAVE A DUMB ? I HAVE A OLD 7 FOOT C BAND DISH THAT I DON'T USE. I GUESS IT IS CALLED A PRIME FOCUS. CAN I TAKE OFF THE FEED HORN AND PUT ON A UNIVERSIAL LNB? OR MAYBE JUST ADD ON A UNIVERSIAL LNB? OR DOESN'T THAT WORK? IF IT WILL WORK WHAT ABOUT THE FOCAL LENGTH? SURE WOULD LIKE TO USE IT. THANK YOU. LEON