So I have a 375 I'm working on, reinforcing seals(with weld-on 40), and I was wondering if there are any concerns to making the overflow slits longer? It's going to be a turtle and fish tank, so it'd like the water level just a little lower than it would currently be. Could I Dremel it? Or could the vibration damage the seal in any way? Should I extend every slit or can I do every other? Never done anything like this, and always had canister filters, so this is all new This is a picture of the overflow.