I certainly understand Mikael. Tuning the OEM stuff can be especially difficult. I have used HP Tuners for years but the downfall is that the OEM manufacturers are always changing the operating systems and have all sorts of bizarre ways of setting up their ECU's. It is very difficult to keep up unless you are tuning the OE systems day in and day out.
As for giving up power, recent back to back testing has shown otherwise. I will have to see if I can dig up the article. On the same motor, same day, same conditions, a test mule actually GAINED HP over the carb setup.