from the other side:
Except for the end slats the slats are loose with a little "play" between slats. We are nearing the end of monsoon season which is our highest RH of the year so wood movement shouldn't be a problem.
This more or less finishes the bench. About the only other thing I might add is a tool rack on the back side of the slab. I'll live with the bench for a bit before deciding if a rack is needed.