You got goals and projects...
I looked at the under seat boxes, but they are rather shallow and you need to fold the seat down for access. The case mounts to the gate post and locks with a strap and rod when closed. It swings all the way around to sit on the gate for access and can be lifted off the hinges in a second to remove, if in the way to load something. It will, also, hold a small bottle jack in the deep end compartment....
