I recently installed an SSO rack and ordered some 95L ROAM rugged cases for roof storage.

I'd like to secure the cases to the rack such that I can open the cases and access their contents without having to remove straps.

As you'll see from the pictures below, I have a ratchet strap looping through the handle, across the inside of the lid, and through the other handle. This does secure the box to the roof. However, the box has quite a bit of lateral play. I'm not real high on driving on the highway with the boxes moving side to side.

The cases do have additional slots along the front to loop straps through. I can use some tie downs to further secure, though they will really only prevent lateral movement in 1 direction.

Thoughts? Ideas?

I am open to drilling holes in the bottom of the cases and bolting them to the crossbars. However, I'd want some mechanism for quick releasing them from the inside.