The problem I had with my old traditional toilet seat on my ecosafe was........back splash. The first time I tried the new square seat......I tossed my old seat in the trash. The depth of it is it's key to success. It keeps the danglie things from becoming blue and wet when dropping a big one into a somewhat full box.
I like your new lid set up pmann. Does the thickness of the lid still allow you to store it in an ammo box?