Hi all Diesel owners, have any of you purchased & fitted the common rail performance device from Chip Express, if so what do you think, does it improve things (performance & Economy) straight out of the box like they claim?

Do BMW have any problems with this Euro Disc i.e. can they confiscate it if it's a copy?

Gents a tip the wife let me into is Tooth paste is good at getting these things clean apparently its an old housekeeping tip for getting rid of rust.