From: "Dwight K. Elvey" 
To: atm{at}shore.net
Reply-To: "Dwight K. Elvey" 


Hi Jerry
 Great idea! You may find thay you should look for
a slightly large disk. It is a little better to work with something larger
than 1/2 diameter.
 Still, if you work with a wide V stroke, keeping the
overlap of the center so that the right and left side of the tool cover
only a small amount of the same area, it should work well. If you just use
center over center, you'll find you'll make a noticable hole in the center
but leave the 60-70% area high. The V or W strokes will make a more uniform
spheric shape.
 This will reduce the time it takes to bring the tool and
mirror to spheric when you switch to the main tool. Dwight


>From: "Jerry B. Hillman" 
>
>Hi all,
>I think I've found something to use to hog out my 16" mirror. It is a disc
>brake disc. Automotive type.  Flat surface about 6 inches in diameter. Nice
>handles to hold on to.  Just have to be careful not to bang the mirror with
>it.
>Also any hints about pitfalls when doing a 16" F4 - 4.5 would be
>appreciated. I hope to have my grit within a week and I have heard that a
>fast mirror is harder to do.  I'd love to make it a F6 or maybe F7 but I
>would end up not using it because of ladders in the dark.  Brittle bones and
>ladders don't go well together.  The last time I fell off a step ladder I
>broke 3 ribs.
>Any comments are welcome,
>Clear skies, Jerry
>
>
>
>

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