Things is I'm located out of the UK and locally there's no-one I trust to do the work.

Now I know the engine can handle atleast 520 BHP with full Porsche warranty so if a reputable tuner like MSD or DMS can re-map it uptill that point I don't see any problem.

Would still like to know the reason for the difference in price and gains, for now I'm assuming it's due to the fact that DMS (as a Porsche specialist) spend more time on a Porsche specific remap wich results in more power and a larger bill, wehereas MSD (being a Ford or non-specific remapping specialist) spend less time on the map by staying within 'known' safe margins for a reasonable gain for reasonable money?

Come on Stu or Will, enlighten me!