I have to do some wiring, including cat5e, speaker wire, coax and phone
wires. In some places some of them came together at the same outlet
location so i got a bunch of those cover plates with two, four, twelve
square holes and you can combine different connectors at the same location.

Now the inserts are pretty expensive, at HD they charge $4.95 for a coax
plug-in, same with speaker binding posts etc...now that $4.95 coax insert is
nothing more than a blank insert (which you can get a box of 10 for like
$2.95), and a M-M adaptor through it, if the blank inserts have holes I can
do it myself, since I have 20 of the speakers inserts to do and four co-ax,
it could add up. I don't think they sell blank inserts with holes do they?
If not can I drill it myself? Only they are so small it's hard to hold it
still...

Any idea?

MC