Built another set of shelves similar to the first ones. ( I think I uploaded a of that.)
Unfortunately with the first set of shelves I had a problem. The screws I was using to fasten the shelf slates to the end pieced were such that sometimes the slats would split. And no, I wasn’t going to drill pilot holes.
Problem solved, and even better they are guaranteed for life, whatever that means.
Next ten years they’ll still be there.