watch some of those drilled 72s, hey can lose a lot of real estate to the overflow.
I made the decision to go undrilled on mine, just to give me more room inside the tank.
I have never had a flood due to my overflow, though you have to me sure the flow rate of your return and the overflow in question are a match, too slow and you'll get bubbles building up and that could be wet...
Just something to consider as long as you haven't bought yet.
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