That is a thought that crossed my mind Bill maybe ADR was the head in production when vw/audi started to play with port sizes so in turn there is some of each in that code

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Any idea what the part number was on your ADR Bill?
The ADR i have was from a friend who runs a specialist vw/audi brakers yard so i only gave peanuts for it, but i'm sure he had another ADR head there if not two more, next time i'm over there i'll have a look and a little measure up if there still there.