I do agree with you there especially in the "I never move" relief valve tunnel I have yet to find one without a stuck plungerJust to worry you Vibrac; after I had the UFM clean I decided I would see how much dirt there was in the oil ways in the timing cover. It was not just dirty oil in there but something more determined. It took quite a long time before the dark material stopped flowing. No chunks of shiny aluminium like an oil filter but just black dirt of some sort.
NB I anyone needs the easy way to release that particular little stuck bung ask me