Replacing the fuel rail feed and return (leaking) flexible pipes
View of the engine with the top half of the manifold removed. You can see the offending petrol pipes at the top of the picture. The two water pipes which are a s0d to get back on are just above the centre of the manifold. You can also clearly see the pipes that go to make up the complex breather system. Mine were totally split. I did a temporary repair using some heat shrink sleeving but it will all have to come to bits again sometime in the near future to replace these. .

View of the top half of the manifold from underneath
You can see the water connections to the throttle body heater plates that can be difficult to get back on. I found it was not to bad if you separated the throttle body from the manifold first. Same would apply to disassembling in the first place (Hindsight is wonderful)