The new keyboard membrane arrived from the UK.
I replaced the membrane and it worked perfectly.

I also replaced the 7805 5v power regulator with a TSR 1-2450 switched regulator.
This one does not produce any heat, så the temperature inside the Spectrum should now be very much cooler.

I also hooked up the Interface One adapter that allows connecting a microdrive.

And on the rear of the Interface One i connected the Multiface One, that allows saving programs to microdrive or tape.
It also allows to pause a game and enter a poke that for example gives endless lives in a game. 🙂

Tested it all, and it works as designed.
Perfect, next project… 🙂