no one will be interested until they see it completed on your car, with a real dyno.

If this works, I think it will be way cheaper than TVT's 250 hp upgrade. I don't see why it wouldn't work, since the German tuners where using nothing but an FMU for the fuel, and I doubt they tuned the ecu's timing, as several guys on MBworld have done a homebrew low boost project succesfully already.