Raspberry Pi tablet case

A tablet type case for the Raspberry PI + official 7" touch screen, with enough space inside for activities!

This is a work in progress, because I'm undecided on screen retention brackets... The screen is a nice tight fit into the recess space (at least on my prints), so it's not really needed (especially if you're constantly removing it for GPIO connections).
And also how to retain the back panel, I was thinking maybe clips, but the panel needs to be thicker or have maybe more infill.
Or maybe even just a few drops of CA glue that could be broken free, I donno.

It's big enough to fit a (remote located?) hat, battery, maybe a few other things. Modifying it with cutouts to suit your needs.

Edit:
Updated the back panel, just extended the inside rail on it (was 0.5mm, now 2mm), the friction and layer lines seem to make the fit decent... Doesn't want to fall out, though I think the corners on the case body need a little sanding, it's causing the back panel to buckle a small amo