Don't worry about thread jacking; I like those ideas.
Are you thinking of bolting that L-clamp to the floor? If I can avoid it, I'm hoping not to put any holes in the floor but I don't know if that will be possible. The back portion can be bolted into the frame bellow the hatch, but I don't know what to do with the front part behind the seat (or where they would be if they were still in the car).
I guess it could be hooked down where the seat hinges screw into the floor.
As for latches on the floor, I've already bought some locks from Home Depot so the floor compartment can be locked down. Don't know how to do the handle yet because I'd love to keep everything flush. If I can't find anything, however, I really like the look of those hasps. I may have to look into those.
Hatch Nation #13 : Rally Revolution #13 : ROTM Jan '13
It's Bryan, not Brian
RSVT-170 Build in Progress
Derusting Rusty Build in Progress