IKEA VESKEN bracket for joining multiple units

I have two Ikea Vesken shelf units that I keep my spools in, and thought I should model up a bracket to join them together for increased stability. Fit is loose but not floppy. If you want it tighter, you can always glue some fuzzy velcro on the inside.I printed mine in PLA but any material should be ok. Four brackets are included in the project file, one for each level of the shelf.