The RPi has been running for a while now. The last thing I did was to cut away a panel of the acrylic case so that the GPIO flat cable can enter the box with the cover on. It's strange the makers of the case didn't consider this but I suppose most buyers, including me, ended up using the RPi as a cheap Linux machine and not as a hardware experimentation platform like the Arduino.
So I'm marking this project completed. If I add other capabilities to the RPi, like bluetooth comms, I'll start a new project.