Hate to dig up a 4-year old thread...
no, wait....I don't hate to dig it up...
since I know it's better than starting a new one.
I, too...need to mount overhead.
My head unit has USB, so the "computer" in it causes noise on my CB.
(yes, I have it powered directly from the battery)
I wondered if anyone tried to use the sunglass compartment?
I took the whole map light assembly off,
and it would only be a matter of popping out the sungless container...
but I was afraid I was going the break the plastic.
Which is not really a problem,
except that I didn't want to ruin the whole unit..
if the idea didn't work and I had to put it back together.