Re: [ATM] New site

["Bob May" <bobmay@nethere.com>]

I'd rather use a diamond hole saw for trepanning the center hole
into a finished lens as this won't spread grit about that can
scratch the surface of the lens.
I got a 65mm OD hole cutter off of eBay for $18 total along with
a 125mm one for another project for $30.  There's a Hong Kong
supplier that is selling diamond hole saws for really cheap
prices.
I'll note that both of the cutters had some diamonds that really
stood proud so I'd do some grinding on scrap glass before going
and cutting a good piece of glass - something that should be done
with any diamond cutter as well as sandpaper of any kind so that
the clumps of grit get knocked off before the real work is done.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Replace the obvious words with the proper character.

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