Just saw the boat pics, man, she looks GREAT!
Another idea on the box drains....Fitz came up with this, and it works great:
At the back inboard corner, but going straight out the back....install 2 ball scuppers.
(edit: right above where that dead fly sits back there
)
When you want to use them for bait, just plug the scuppers from the inside.
Otherwise, you can use the boxes for storage, and they never hold water, except for a little rainwater.
Any water that gets in...when you throw her on plane...runs straight out the back, boxes becomes totally dry