Has anyone found  amp meters to fit the front openings that are covered from the factory?  I’d like to know the amps drawn by my equipment.  Also, I’ve added an external DC filter since at the time I purchased mine (2021?), the option wasn’t available.  Has it helped? No idea since measuring DC with a volt meter isn’t very realistic.  But, I can tell you that no matter what appliances are on in the house, it does not impact sound.  Also, my ZLC is on a separate line from the breaker box with nothing else feeding off of it.