So, I have the EK-XRES 140 Revo D5 pump/reservior combo. Just wanna know if I can use the port that's in the lid as an inlet port. Manufacturer's instructions say it's not meant for an inlet, only as a fill port, but I've seen people use that set up on reserviors. Anyone ever do it and know what the difference is? I have to imagine that all you'll get is the sound of trickling water, and even that might be muffled pretty well.