Standard tank vs drilled RR- overflow boxes?

[marie74]

I recently started my first SWFOWL tank 56gal cornerflo with wet dry sump.

A co-worker offered me a 90 gal standard tank that he needs out of his house because his teens are taking over his fish room as a game room.
so...
it is not drilled... anyone use overflow boxes? experiences? recommendations??

 

[Sniperhank]

I have an overflow box. It works, I use a CPR one with an aqualifter to prevent losing siphon. I'd kill for a drilled tank in comparison, but almost doubling the size of a tank is always worth it.

 

[Terrance]

I've read many good things about hob overflows, and a few rare bad reviews. The rare bad reviews kept me away from hob overflows and I ended up drilling.

CPR overflow with aqualifter is my favorite.

 

[Daniel Fishy]

I run a eshopp 800 with a mag 7 no problems and siphon always starts backup. Very easy to set tank level and flow thru fuge is nice.