[amsat-bb] Rotating PVC on Elk Antenna

[Lance Homer]

A week or so ago I asked about mounting the Arrow Antenna on something
other than the very end of it.  I appreciated all of the great responses.
In the end, I decided to go with the Elk because I found it on eBay and
could save some money.  The pvc tubing the previous owner used is difficult
to turn and I'd like to correct that.  I tried Googling to see if simply
sanding the inner pipe a bit would help but I didn't get any results on
that search.  What have you done to make it so that the tubing is a easy to
adjust from horizontal to vertical but still is tight enough not to shift
on its own?

Thanks,

-Lance / K7LQH