Thanks guys for all the info so far…. especially the Cornish bit!!

    Kind of makes sense with regard to the lean burn etc, but would not fitting an external air intake have made more sense than installing the “vacuum cleaner”?

    All of the so called evolution in sound proofing is far outweighed by having this noise in the background.

    Is it really necessary?
    It is only the D120 unit …..

    Short of going down the Dr Pepper advert approach of “What’s the worse that can happen” (engine catches fire, boat sinks, everyone dies!) – Is there another approach?

    I agree that Bav do not fit all of their kit “because it is nice to have!” – with most of it being necessity….. but is this necessity in the UK / Channel?