That's a good piece of info saving him the heart ach of a shattered tank ,
big tanks aren't cheap , that's why I chickened out from drilling my 90g ,
the gravity fed overflow proved itself as the best hob
overflow out there IMO
it's self priming which is one of the best features , it also stops the overflow to sump when power goes out self priming is a must saves the head ach of getting siphon going again after power outage , also prevents air lock since it don't use siphon tubes .
you would think it was drilled as it flows so smoothly with out ever stopping
like the siphon type often do
the next best option to a drilled tank I swear by mine that's how much I like them .
cost a few more $ than a standard overflow but worth every cent .