Hi . Just joined and would like to know if we can alter the lengths of our virgin cables. We have 2 TiVo boxes. One in the lounge where the cable is too short now due to decorating and one in our daughters bedroom which is too long. This one was run from the bedroom, down outside wall into the lounge. The engineer left the excess cable rolled up behind our tele. Years ago this was fine, it was hidden. Now due to decorating it sits proudly in the corner of the room. Can we alter the length ourselves??