[TenTec] Orion Bottom Cover

[Stuart Rohre]

Most things with adjustments under a cover and no adjust hole have a drift
character that you can quickly master.  Then, after some experimenting, you
can over adjust, so that when the cover is in place it drifts right on where
you want it.

I usually end up drilling the extra access hole.  Does not seem to upset the
thermal situation and saves the aggrevation of approximating the adjustment.
-Stuart K5KVH