Educate me, what is bluefin? Perhaps I missed something in the thread.
Saffa_G your car will do much better with a tune at high altitude (Viva Pretoria!) My understanding is that the superchips tune is not detectable by the dealers. I have been running a tune on my 120diesel for 3 years without any problems, servicing, maintenance plan or warranty issues.
BONE STOCK BUT CHIPPED