I think the vanos socket is just fine because it is inside of the chain. My suspission is also the no 7 or that no 16 came loose. But before I have taken it apart I have no clue just guessing.

I dont think chain guide 10 has a mechanical stop it´s actually quite similar contruction as BRP has on the rotax engines it's the chain that is the stop.

Well I think I have a couple of hours of dissasembly, need to remove bottom pan, cooler front etc... I will try to change the chains and guides with the enginge in the car but I dont know if it is doable, time will tell. The tensioner on passenger side is my biggest concern right know there is not enough room to take it out.