REFLECTOR: Advanced Electronics Com Antenna

[Tom]

It appears I do not have a 2nd com antenna glassed in my Velo. Came 
across this antenna which mounts inside and doesn't need a ground plane. 
Has anyone tried this and had any success?? My thought was to mount it 
flat under rear seat as I don't see any easy way to do it vertically. 
Opinions welcome..thx Tom

http://www.aircraftspruce.com/catalog/avpages/antennasystems.php