Since the post just got a bump I figured that I would add some recent pictures that I took the other day...
This is a photo of the back of my 120 RR tank with a recently cut hole for a 1" Bulkhead.
Here is a series of shots of cutting a second hole to allow placement of another 1" Bulkhead...
Duct tape is on the inside of the tank so that the glass hole piece does not drop into the tank...
that is the diamond coated drill bit...
and the last two photos were difficult to take but they show a side view through the glass that is being cut. You can see the hole being carved out of the glass through the side edge. It was difficult for the camera to focus correctly.
