Thanks for the comments. The grills do rotate, but do to the way they are mounted they will not line-up. I took this sacrifice vs mounting all 4 next to each other again for the value of the walk-through headroom. I'm sure there may be a way to line it all up with some modifications, but I was ready to hit the water
At party cove volume the stereo will play for about 4hrs w/out cutting the boat on. Since the funds ran dry, I made the sacrifice on the 1 battery which I charge each night on the ProSport. Just gotta pick the right time to throw down the jams, but typically after 4hrs I'm in a good spot to pass the tunes off to another buddies boat. I have two group 24's that I key out via the perko for starting.