From: "Jerry B. Hillman" 
To: 
Reply-To: "Jerry B. Hillman" 


Hi all,
After much frustrating effort I have decided to put the 16.5" tile
tool I made awhile back to use as a full size pitch lap. I have a kilogram
of #64 pitch still unopened. It should be enough to pour a pitch lap. I am
concerned that it is #64 since I understand that its working temp is 64
degrees.  It is much hotter here than that so I guess I will have to cook
it a little to make it harder.
My mirror is resisting my efforts working TOT to make the necessary changes
to the edge. With a full size pitchlap I will be able to work MOT without
so much risk of astigmatism as I would have if I worked MOT with a 10"
pitchlap.
I have never made a pitchlap this size but it shouldn't be difficult with
the pitchlap mold I have. Being able to work MOT will enable me to apply
some of what I learned on the 10" mirror I made to this mirror, and
pull this thing through to completion.  Hopefully, I will also have my web
site back up so that I can post more Ronchi pics for evaluation. Thanks to
all who are helping me and following my progress. It means a lot to me to
have your support.
Clear skies, Jerry

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