Last time I checked NE marine wasn't carrying Bonar but a different brand.
I got a cutting surface mounted on my lid.
A handful a screws counter sunk & a few blobs of 5200 hold it on.
Attached a few 2x6 pt treads under bottom of box for a perfect height to fillet and avoid back pain from cutting long periods of time.
Lid is awesome for cutting with 1 exception. It's heavy !