On Sat, 23 Jan 2010 23:03:40 -0800 (PST), Frogwatch
wrote:

Tom:

I buy Garolite (G10) in thickness ranging from 1/16 up to 1" and in
tubing and various other forms. I only need 2" X 2" for this piece.
Twenty minutes of machinist time to make. If it is done by cnc, maybe
an hour of programming time and then no machinist time.
OTOH, Aluminum corrodes and would ultimately cost more.
I only needed a 2" X 2" X 3/4" for this part.

Hey - what ever works. :) I wasn't trying to one-up you, I was just
curious.

I must admit I haven't worked with the G10/FR4 material in a couple of
years, but I know it was expensive - I think we paid like $800 for a
36"X48" sheet of 1/8th inch thick - we used a copper salt bath to make
trace circuits for a microwave experiment.

I would imagine if you use the stuff all the time, the costs go down
in quantity.