Hey everyone, about to have a crack at making my first glass piece out of an alcohol bottle or vase (whatever I manage to find that looks the sickest) and I'm seriously struggling to figure out what size drill piece and grommet to use. The downstream I will be using for the piece is 14mm. Judging from other online sources I should use a 5/8" diamond glass drill bit (correct me if I'm wrong), so then what size grommet do I need to buy?