yeh i bought my f90 that had 2.0 firmware pre-installed. i modded it and changed the value to 128.0 and everything worked fine for the most part. but for some reason i sometimes get the bad grounding error msg, but after hitting ok i can still access everything while driving.
and ifthe value does reflect kph and not mph that could be my issue cuz 128 kph is about 80 mph i believe, b/c i got the error msg while driving on the freeway so i might have exceeded that value (according to a quick google search) so im going to try changing it to 256.0 and see if that helps or maybe i just have a bad/loose ground.