
There is a shallow tray over the spot for the 'B' drawer.
Now to make myself a tall hinge.
First I need to make myself a finger or key (my word for it). I've also marked a flange that I'll expand out that's got clearance enough to allow the joint to rotate.

Next, I make a copy and rotate it, then position it so that the flange coming out from both keys give me the correct spacing.

Finally, I move the opposite side key out and begin the work of joining single keys together to form a string. Eventually I'll have myself a piano hinge.

Once I have my desired length and have capped it properly, I'll run a rod thrugh one side and add it to my tray and make the whole thing a component. The other side will be bound to the base and become another component.
There's probably an easier way, but this is the one I can do.