Just a quick update- there's now an update to Raspbian containing Kernel 4.1.6, it looks like some recent changes to support other products have had the knock-on effect of making it much, much easier to get the DFRobot/RoboPeak 2.8 USB TFT up and running.
It's early days, and I've got to make sure I test it under a fresh install of Raspbian on both the B+ and the Pi 2 ( since they use different kernels ), but it looks like I'll be able to write a script which will drop the
rp_usbdisplay.ko module into the right place, run
sudo depmod and get the display up and running in seconds. No need to download, install and run a full kernel and modules anymore, which is nice.
Anyway! Bear with me.