Duo overflow in 180 galon

[Nivagg]

I picked up a 180 g tank that has overflows in both corners. The overflows have the black factory made cover with the slits . It has been suggestd that I redesign this because people who have them have problems with the noise and clogging. I'm wondering if anyone has this kind of set up and kept it the way it was and been ok with it. I really dont want to move this tank twice .