Had my INSP 1 carried out by the guys at ETA this week, i also had a bit of preventative maintenance carried out with the Vanos getting overhauled, all the seals, timing chain guide, AR shims (not sure what these were but vanos related),Vanos bolts (mine being a late model already had the uprated bolts) but these were replaced with further uprated versions, they also replaced the oil pump hub for one with slightly smaller holes, this almost eliminates the 'rattle' that can occur and leads to the oil pump driver tabs from breaking off. All in all great service and advise from ETA, these boys know the S54 engine very well. Fairly local for me so i'll be using them in the future and i'd definitely recommend them