Are you saying that you have a CM3018 now?? If so then install it and aim it at 61 degree magnetic compass. Install a CM3418 distribution amplifier inside the house and have a coax from each Tv location go to a output port on the distribution amplifer. If you do not have a CM 3018 now , then I recommend a Winegard HD7082P antenna , aim the Tv antenna at 61 degree magnetic compass. With the CM3418 distribution amplifier inside the house and have a coax from each Tv location go to a output port on the distribution amplifier. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html . Mount the antenna on the roof.