i've used and known john at black magic tuning for a long time now i always send my map work or ecu problems ie he can repair or clone them can also do stand alone maps ie get bigger injectors to work and all kinds of stuff that a normal garage wont even know where to start, also can do dpf deletes and egr delete and maps to suit the driver ie i like early boost early power for best mpg and low revs, or someone else might want all at the top end or 50/50 etc so all his maps done from his mobile service or at the workshops are bespoke to that driver and car, he also tales bookings for mobile service all over the country and when gets a days work in that area the van gets sent there, or can have a generic map done by posting the ecu to him he maps it with a mid range map sends it back,, i always take my car in and we go through my cars together, just asked him to give a forum price for this, 2006-march 2010 cooper d with the psa diesel, to remove dpf filter. remove egr. remap to bespoke setting with the owner at his workshop £270,, i have had two of mine done in the past same way and they just become more like a cooper s that still does over 70mpg when driven low revs, that will give cooper s power . also dpf delete makes oil stay clean engine lasts linger