As some of you know, I tried everything to keep my F10 - also tested it with boxes like Speedbuster, RaceChip Ultimate and others. Although it definitely was faster (especially with the RaceChip Ultimate) - the size and poor driveability of the otherwise glorious F10 made me trade it it towards my current M235i - no more tuning necessary! Although it would be easy and cheap to just send my unit in for reprogramming and harness replacement to suit the N55 - I'm selling it...
Please PM me if interested.