At this point I start to build the last of the components of the basic structure: the hard disk structure:

When i bent the shaped panel I broke it! 🙁

At this point, I must find another way to keep the 3 pieces together 🙁

And this is the other way: I have flipped upside down the lateral panels, and I have fixed them to te top panel with some bolts

And now, the slides for the hard disks.

I cut the pieces:

I assemble the pieces together:

In the last image you can see that the slides below are closer to each other than the ones above.
This is because the hdd structure must be trapezoidal like the rest of the case!

The slides are as long as the hdd, so you can insert and extract it like a drawer: