Drilling holes in glass is easy. I use a regular drill with diamond core drill
bits, which are available from Widget
Supply for about $3.
Before beginning, I spray the bit with WD40. Oil will work as well. This helps to preserve the bit, and probably drills a smoother hole.
The hole must be drilled in water* in order to siddipate the heat which the drill produces. I use this stainless steel basin, laying the glass ontop of the rough side of a 3M sponge. The sponge absorbs the vibrations and helps keep the glass from slipping.
* It is possible to drill a hole outside of water, by just holding the glass. HOWEVER, iif the drill bit goes through the glass and into your finger, taking little shards of glass along with it, it will not only hurt, but bleed, alot.
Steady pressure (I use the fastest setting), results in, what for my needs is, a perfectly acceptable hole.
Cutting Glass
Hold the cutter as indicated in the picture, drawing it steadily towards you.
With the scratch on top, snap the glass in half
Cutting glass is easier than cutting paper, with the right tools. Get either a pencil style cutter, or a pistol style cutter. Make sure that the device has an oill reservoir. The wheel must be lubricated if it is going to cut effectively.
In this picure, the scratch is facing the viewer.
You can smooth the edges witha nice grinder from Gryphon.