[TenTec] Omni C question

[Jeramy Ross]

I asked the group this a week ago, but it seems to have been missed
due to QRM on the list.  I now have a great Omni C at my station here.
 It's beautiful and in perfect condition, loaded with filters, and PTO
recently rebuilt by Ten-Tec.

Seeing that I love this rig, and it has quickly become my favorite rig
of all time, what do I need to do to make sure this radio is with me
for a very long time?  What maintenance/care issues do I need to be
aware of and look out for?  What parts are in short supply that I
should look at creating a stash of to ensure serviceability for many,
many years into the future?

73,
Jeramy / W5XTL