Ok, I transferred all the information from configuration.h to the new one for RC6 bugfix and flashed it. I can't get it to home to the back right as my endstops are set up for (and as a lot of makerfarm I3v's are set for) previously there was a place to define the home as back right which I don't find in the new configuration.h. I saw somewhere a positive/negative homing direction setting, I will go look for that.