I decided instead of buying a new system, which I can't afford, I should just do some work on my current tank, which I currently am not a fan of. It is a 36 gallon corner with 5 sides, not curved glass. It is not drilled. I am afraid to drill it because I have no idea if it is tempered or not, is there any way I can find out?

The first thing I will do to this tank is add a HOB overflow, and a canopy.

Does anyone have any plans for making a corner tank canopy?
I have a drill press, and a table saw for tools.