From reading on the Internet, I have learned that when cutting (scoring and breaking) glass, it almost always goes well with new glass, but with old glass there is a risk of the glass breaking in unwanted places. That is also my personal experience.
I need to to repair something, and it includes either cutting or drilling in an old piece of glass. I watched a few videos on YouTube with drilling in regular window glass, and it seems to always go well. But now I'm wondering, does it go well for them because they only work on new glass?
If I drill in my old glass what is the risk of it suddenly cracking? And if there is a risk of that, is that risk comparable to the risk of failure when cutting it? If the risk of failure with drilling is as great as the risk of failure when cutting, then I will instead try to cut.
I plan on drilling with a glass/tile bit, under constant flowing water.
I know that people on the Internet tend to answer even when they have little insight, so if you answer I would appreciate if you make it clear what you base your answer on. For instance, maybe you have worked with old glass for a decade and drilled hundreds of holes :)
