Just a little bit more information on the alignment story.
There are no locating dowel pins or guiding lines/marks. Which is very strange unless part 5 can be fitted in any position. This makes sense as Alfa Laval always marks its parts with pins or lines if they have to be fitted in a certain way to each other.
The two holes in bottom of part 5 where aligned with the holes in part 1. Then the holes in the circumference of part 8 where aligned with those on the circumference of part 5 (these holes lead to the ones in the bottom via two bores).
Note: part 12 is aligned with a dowel pin to part 8 (part 12 a).
Will keep you posted as we are at the moment also overhauling the second seperator.
See if the trick works a second time