Now I just have to get around to installing it on the ST... 

Well, I've made a start with the installation...although at this stage I've mostly been working out the best location for the main unit
which will be mounted in the rear of the bike alongside the tool kit as can be seen in the pic...

The problem is there's no real easy spot to mount it as you need to be able to access it fairly easily for micro SD card access.
The answer for me was to fit a small aluminium plate to mount it on.
This will make it easy to mount the unit using velcro which in turn will also allow access to the tool kit if needed.