Thanks zulu for the website. Was always wondering what the diamond core drill looked like. And was always wondering how to hold the drill bit steady while drilling. I seen that they also sell the guides that clamp and seal agains the glass and to supply the coolant. I am thinking I can get the diamond drill locally and if need be I can machine the guide myself since I am a machinist. I am thinking to just run water through the guide to cool the drill, should be no reason to need oil. And also I will check into the dremel idea further, I will talk to the tool supplier and they should be able to give further comments.
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