For those who reside in Canada, here's an optical punch available from Lee Valley:
http://www.leevalley.com/en/wood/page.aspx?p=45502&cat=1,180,42311Jim
--- In Homebrew_PCBs@yahoogroups.com, <n0tt1@...> wrote:
>
> About the grizzley tool...
> In case anyone is wondering how the tool works.
> The sights are the plastic cylinders
> with precise cross-hairs at the bottom. The cylinder
> gathers a surprising amount of light on the top portion
> (the part that sticks out of the black aluminum holder)
> and effectively illuminates the cross-hairs and what
> you want to mark. When everything is lined up, you
> hold the holder in place, then pull out the plastic
> cyclinder and replace it with the metal center punch
> and give it just a "tap" with a small hammer. That will mark
> the exact spot where you want to drill, punch or whatever.
> There's a piece of rubber on the bottom of the aluminum
> holder to keep it from slipping while you're doing the marking.
>
> Charlie
>
> On Wed, 31 Jul 2013 03:49:16 -0000 "cunningfellow"
> <andrewm1973@...> writes:
>
>
>
> > Charlie wrote:
> >
> > I purchased one of those from Grizzley Tools.
> > Look here:
> > http://www.grizzly.com/products/Optical-Punch-Set/H5781
>
> Thanks Charlie,
>
> That looks the part for the lens (The hard part).
>
> Just need to replace the marking punch with a
> hole punch and probably a through bore on the
> holder. Or maybe a complete replacement holder &
> punch.
>
>
>
>
> [Non-text portions of this message have been removed]
>