The CS600 is a ->Strong<->Sturdy antenna.
The CM4228HD is a ->Strong<->Sturdy antenna.
Install the CS600 on the bottom and the CM4228HD on top separated by about 2 or 3 feet.
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Here are some choices of Strong and Sturdy antenna mounts.
http://www.ronard.com/Tripods%200703/4712.html.
http://www.ronard.com/909911.html. Use the 5 foot tripod antenna mount.
http://www.ronard.com/34424560.html. Use the #4560 eave antenna mount.
http://www.ronard.com/ychim.html.
http://www.ronard.com.
Buy the ronard antenna mounts at ,
http://www.solidsignal.com , by typing the word ronard in the solidsignal search box or buy from ronard.
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Here are , Aluminum , Light Weight , Free Standing , No Guy Wires , Lay Over Towers.
Do antenna installation and adjustments standing on the ground.
http://www.palcoelectronics.com/pe300.aspx.