would like to know if its ok to flash in factory files that are a different OS number and or calibration or even boot loader? does boot loader make a difference (502 vs 503)? am i to match OS but calibrations can be different? or match calibrations but OS can be different? is there a way of telling if a calibration or OS is an "updated factory release?" for example i have an 08 6.7 with OS 11620807 and Cal 62340435A boot loader 502... if the factory had released any updated software that supposedly fixed some issues how would i know what file to look for?