So I installed my idrive controller & start/stop button - sorry not a very good picture but they look fantastic in the flesh.
Installing them was a breeze. The SS button came out in one tug and the controller was easier than I thought it would be, although I did find it easier to disconnect the controller rather than do it with the ribbon still attached. Really the hardest part is lining up the crystal touch-pad arrows with the arrows on the printed circuit board, it's as simple as that to be honest.
I had to return my gear shifter as it had a small defect, though Martin at Car-Analysis has been fantastic, the best after-sales support I've experienced in a long while! Now really looking forward to my replacement shifter to complete the mod.
Oh by the way, I got fed-up looking for a second battery so I called my local BMW dealer and spoke to the Parts guy who asked me for the vin number, he then was able to confirm that I had only the one battery.
Steve.