I have a friend who gave me a Comet GP-15 antenna and I need help setting it back up. I have the aerials marked to go back in the same holes that they originally came out of. He tells me that they have to be set at a certain length also. Is this true? And if so does anyone out there know what the lengths are or where I can find a copy of the manual to look at online? Even an e-mailed copy would be nice. Thanks for any help I can get.