Just realised how cleaning your bay in some of the pics can reveal a new manifold, ECU and other colours and a brace
That guide is ledgendary as this gets covered a lot
I personally would steam clean as i find that you still have to dry and wipe everything down after with products and you get the same if not a better job with WD40, strong degreaser such as CG Orange Citrus degreaser just sprayed on left and then wiped down