Gents, it is done: I have successfully removed the intake manifold - and to my despair, I can confirm that the Plus 4 GDI also tends to clog up the intake valves because of the PCV. See my short video of removing the intake manifold. I will now install an oil catch can to at least slow down this process significantly - more to follow!
Very well done Robert, excellent job & video.
Look forward to the next instalment and hope you have no issues putting it all back together. I saw a video of someone who cleaned the back of the valves one at a time by manually turning the engine until a valve in a cylinder was Closed, then soaking the back of the valve in cleaner (half an hr) and then soaking up the cleaner with paper towels, probably worth doing before you put it back together.