Decided to drill my tank

[Easto]

I was thinking about drilling near the Middle of the overflow Box height. Then putting the siphon tube with the elbow facing down. I haven't measured but I'd think that would give 1.5" - 2" between the siphon and the bottom of the box, which sounds like it's fine.

The second one I'd drill at the same height but turn the elbow up facing.