I acquired a truly massive piece of glass. 24" diameter by 4" thick Pyrex. It weighs 146 pounds. Both sides have been polished, one with a very slight sagitta. What can I do to lighten it?
Is there a service that can maybe water jet cut honeycombs in the back? (There is a water jet cutting service near me, can those machines work there way down in predictable depths?)
Slice it in 1/2 and get two blanks? Who does that?
Grind it down with an angle grinder while spinning on the table (under a water bath)? There's a video where Waite says he does that and averages 1/4" per two hours, so that could be like a 16 hour solution, but what a waste of time and material.
Is there a service that could melt it down and re-cast the material into useable blanks?
Leave it full thickness and use a car jack to install it in the tube? The weight would make the rest of the build (I've designed a fork mount, but we'll see) very expensive.
Maybe it's a white elephant? Like, it's cool, but what the heck can I do with it?
It's got a 20 meter radius of curvature polished into it. 32 foot dob? (just kidding on the long tube, I want ~f3.3).
What should I, can I, do to put this super cool blank on a diet?