Shao, I phoned action glass and they gave me a phone number to a place in Surrey that sells them. I got a very in expensive one, it was about $20 and they gave me a small bag of the cutting compound. So far I cut about 10-15 holes and it's barely started to show wear. I don't remember the size it is though I'll try to check tomorrow and if it's a 1.5 you are free to borrow it if you have a drill press.
Doug
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