[mydumname]

Tip for starting the hole.....get a normal hole saw same size as your diamond drill bit. Drill a hole in a thin piece of wood...quarter inch half inch whatever....then hold that wood over where u want your hole and use it as a guide. This will prevent the diamond bit from sliding on the glass.

Simple to do.

 

[mydumname]

Gets water on my drill bits just fine. Drilled many tanks this way and multiple holes per bit. Plus I get my bits for a couple bucks a piece so if it does shorten the life one or two holes....oh well. To each there own tho. I would rather not have the bit travel.