I already have a ZX Spectrum - well, a couple really - in my Pandora:

https://repo.openpandora.org/?page=detail&app=zesarux

.. incidentally, the Open Pandora runs a ton of great stuff:

https://repo.openpandora.org

Sinclair had, it seems, a design tradition that oddly mirrors Apple's. Lots of brilliant prototypes, and I hope the Delete book, which is where I first saw this, hasn't exhausted the treasure trove.