Hi,I'm looking at a H23.5 water ballast. doesn't need it now but was thinking about the future.what holds the side windows and the front window in the boat.I'm used to seeing a trim ring or screws etc on all of my other boats.You can see nothing from the outside, just the lexan sitting there, and thenon the inside the upper liner covers the window edges completely up.are the windows just bonded there from the outside?what would be the process for replacing the windows should one of them get damagedor starts leaking?thanks James Breland