My dumb question is: how are these vertical "dividers" attached? I'm guessing each one is one continuous piece from top of unit to bottom (as oppose to separate dividers for EACH row of shelf). If so, does that mean to make these dividers, I need to rout slots on a board to attach them to the shelves? I don't have a router and so I'm hoping there's another way to attach these dividers.
Thanks in advance.
Best regards, Kevin