So I took a little video to see whether the rockers move evenly and it appears they do?!
There is a bit of a grey on the dipstick when you wipe off the oil, so that worries me a little bit. On the other hand, I have driven the car less than a hundred miles with the new engine. I wonder if that's enough to completely wipe out a cam lobe?!
Anyways, I'll take off the rockers next to inspect the push rods. It looks a lot more complicated to get the lifters out than on the slant though...