Lower the internal box as far down as it will go. As for the sump :thinking: gonna either haveto be creative or drain it down....... It's acrylic baffles isnt it? If so take a hacksaw blade, just the blade, and use it to cut 2 lines down the baffle, then take a sharp razorblade and etch DEEP into the acrylic where the two lines end, connecting them together. Keep etching it until you can bend and snap it off. Be careful not to break you're silicone seal. If its glass you're gonna have to drain it down and remove it, cut it and recaulk it in. If you have a dremmel tool with the flex attachment that would prob work for the acrylic too.