Mine is also screwed into the cap of a cider block wall, makes it easy to balance too. As far as the line to the ISS, I used just the phone cord itself running through the desert (knew it wouldn't last) and sure enough was chewed through within a week. So I got smart and fished it through a garden hose (talk about a PITA), that got chewed through the next day (really, what the hell I got out here?) Soooo, I
really got smart and fished it through flexible metal conduit, 10 times easier than the hose, and knew that's how I should have done it in the first place.
That was the first of the year and ain't nothin' chewed through that.