Just some thoughts while they are fresh in my head. I was thinking a little while ago about a way to get rid of the screws on the lids on 6x6x4 boxes after seeing Arch's latch on the sqeaker post. you might be able to put some spring loaded hinges on one side and a lockable latch on the other side or make a diagonal bracket or crisscross to go behind the screwholes and screw them in from the inside with bolts ends sticking out the back. You would need to offset the X in the middle to create pressure. Drill and thread a hole in the middle of the X, drill a bolt hole in the middle of the lid and replace the 4 bolts with one bolt...would save a little time removing the lid. What do you think?