Jojo...I drilled mine with a tile/glass bit in my dremel. I marked out a circle, and ever so slowly drilled through the glass with the bit then slowly cut out the circle. I kept putting water on it the whole time to keep the bit and glass cool. Worked like a breeze...very easy. I had no trouble whatsoever, and wayyy cheaper than a diamond holesaw or glass drill bit....oh and I used a Roto zip not a dremel.