So, tis finished!

The cubbies are really, really bad, but they work.

And the pièce de résistance: a really large paper towel holder:

It's actually a
gift wrap dispenser. It holds my tracing paper (soil separator cloth) really well, and I bet it would also work for other standard tracing papers.
The only problem is I bought it after I had started building the cabinet. So its not centered at all. But, I don't really mind.
I've got so much storage in this. Oh, and that far left middle drawer that I simple couldn't get to work? DH asked which drawer was the problem. Right as I was about to scream "don't touch it, that's the one that's broken," he opened it like a dream. Sigh. I don't know what my problem was. But it's working perfectly now!