I am about to install my wire fed end antenna I have a mfj 915 and a my antenna CMC 0510-r waiting for the weather to clear up when it does I'm going to install the 915 outside and I was told by a local friend to leave it on the ground but a ham operator told me to install it vertical with the cable feed line I forgot to ask him if it was waterproof I noticed there's these two holes on the end caps which I hear is for air but is it waterproof so does it matter if it's lying on the ground or if it's hanging vertical and are they waterproof to where I can just put coax cable sealer on the ends and leave it hanging outside? Any hard learned wisdom would be much appreciated