Hey Phat...great use of found space!!..,.could ya put a flat bottom side to side across the V of the the bilge that would be at about the same level as the bottom of the fish-box...would make a dryer (not DRY) space of it and keep things from getting under the fish-box...and if ya remade the hatch-lid of starboard, the you'll never have to replace it again...cut that inside turned up lip away and looks like you could use 3/4"...I've got a piece I THINK would do that for ya...if ya wanna measure it and let me know, I'll check it out...