Re: rear hatches/liners
 

I put a big piece of dense foam in one box and loaded it with trolling sinkers of several different sizes. cannon ball style and torpedo sinkers. The other side I use for debris and old fishing line.

Re: rear hatches/liners
 

I used one side for dock lines and the other for fishing odds and ends like sinkers and such. I just drilled a small hole in each one to forego storing the two cups of rain water like jaysea. ;D

Re: rear hatches/liners
 

As i have the big I/O, my bins make great ballyhoo defrosters or thermos' for keeping coffee nice and warm.
They also hold dock lines, drain plugs, and sometimes even live bait in the port one!