I would NEVER consider re-doing a boat without deck drains !
Case in point, "NoBones" tied up to the dock at the Keys house..
12 inches of rain that night.. Woke up next morning, all good no water in bilge or deck boat still floating !
Gravity is your friend..
Battery powered anything is not your friend !
Done correctly deck drains work everytime,
My 1975 Hewes flats boat has drains. just sayin'
Never say never..