OP
pennywise
I used to have a few Systainer boxes which came with a festool jigsaw and a bosch drill but didn't like them as I had to fasten 4 catches to lock them together etc. The sortimo boxes just click and have 2 buttons to release. I just wish you could get foam easily to fit them so I could cut to shape for tools. The new Systainers look good though!
Thats the reason for the upgrade one lock to release and lock beats having to undo all 4, plus being able to open a middle box in the stack without having to disengage all of the ones above.