No it's from GlassCages.com and the reason I am drilling it myself is because without them having the overflow in their hand, there's no way to guarantee the hole is exactly placed where i'd need it to be. I'm not afraid to drill a tank myself. I was, then I read so many people saying how easy it was and saw so many vids that I feel prepared to do it myself.
it is very easy. just use plenty of water and start at a small angle.
I drilled mine a few days ago, then I drilled 8 bottles so my girlfriend could do incense. I didnt break anything, and that was my first time drilling a tank, no prior practice.