93 rimless cube

[Ajholms0427]

I want to drill a 93 rimless cube for my return. If possible I would like to drill the bottom next the existing overflow holes but I'm not sure if the bottom glass is tempered? If it is I would like to then drill the back in the overflow section. Any input?
Thanks

 

[Gary]

Sounds like it was drilled already, resulting in the bottom pane not being drilled.

 

[Gary]

This would be a test.

https://www.youtube.com/watch?v=-xiD7C0hLX4

 

[1000rrstunna]

Do not drill the bottom!