On Sun, 10 Apr 2016 12:53:29 -0400, Ed Huntress
wrote:

On Sun, 10 Apr 2016 09:10:33 -0700 (PDT), "
wrote:

On Sunday, April 10, 2016 at 9:02:09 AM UTC-4, Ed Huntress wrote:
Do you have a machinist's square that will get inside of a 1/2" hole?
g

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Ed Huntress


Don't need one. Can put on some dyken and scribe the aluminum so I have a line to file to.

Dan

And that's how I would do it. But your sentence said you'd use files
"along with a machinists square to ' file to fit,' so I was pulling
your leg about filing to fit, using a machinist's square. d8-)

If you talk to him further, tell him how to do that layout, and to
scribe diagonals to find center for drilling the hole, and about prick
punches and center punches...

If you get that far.

Gee, isn't that getting pretty technical :-)

(The old fellow who was the apprentice master" when I did mine had
served a 6 year apprenticeship and said that the first year they
showed him how to use a broom and second year he got to use a file.)

For his Journeyman's "test" he made a surface plate..... by hand.
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Cheers,

John B.