Your pretty safe as long as you stay away from the main dealer "Evan Halshaws" although saying that they have sacked the head guy in Aberdeen and taken on a honcho from Audi and there is a bit of a "re-shuffle" going on getting rid of the driftwood.
So heres hoping the service will improve.
Also I tend to stay clear of Wallace Performance, it always gets mixed reviews usually to the negative. The one and only time I used them I asked them to solder a chip to an ECU as I'm not great at it....looked like they had done it with a hot axe, and had the cheek to try and charge me £50 for it, needless to say the connections were terrible and the ECU didn't work.
R