I did one of these for a recent job and the partition is lock-tenoned into the deck, back, and the stretcher under the drawer. No need for any fastening, the mortise and tenon fit-up is just fine for these.
We used 12 mm baltic birch ply for the partition, which is part-edited to do the concave curve at front edge.
Three questions. Is there maybe a better way to do this tray divider thing?
And second, if this is OK, might a different thickness than 12 mm be better?
Finally, when I want more partitions, am I going to have to part edit every one, or is there some trick way to replicate the part?



