Solved Succulent identification?

Hi everyone, I had this plant given to me around 6 months ago, while not dying its not thriving, losing leaves in particular, I'm thinking not enough light. I want to try and repot but I can't remember what the name was. This is the plant passport that was in the pot.

 

It's Peperomia ferreyrae - not a Crassula as per label. I have lots of it. It needs a free draining compost.

 

Thanks @Michael Hewett what mix would you recommend?

 

I use multi purpose compost with grit added. I don't measure it, I just add a handful of grit to make it drain better.
You could also use a succulent/cactus compost.
Mine loose leaves too, I don't know why, and the base of the stems are bare. Maybe that's the way they grow.