Thanks guys that's really kind of you to say so. I'm not sure about the plant list at the moment, I'm hedging toward HC cuba across the front and sides with a few bits of E. sp. mini and S. repens here and there. I'd probably like more carpet plants but I'm struggling to visualise how they would transition form one to the other naturally.
At the back probably H. Micranthemoides, and some mini red stems - haven't decided which yet but suggestions welcome.
I may also try to strategically place some mosses on the hardscape, probably Fissidens, T. barbieri, and V. dubyana.