i dont understand your confusion.
you have an ori obd read, tuned obd read, and can obviously bdm.
read bdm, compare obd ori to tuned then copy those changes to the bdm read and reflash.
am i missing something?
That's exactly what I want to do.
Firstly when I remove the no read on tuned file and then open in OLS I get some warning about ECU may be bad and then I correct the 1 incorrect checksum. I expect to correct the checksum as I have changed the file by overwriting with f's. But still not sure about bad ECU but everything checksums fine and get 71 which is correct. Ori obd read does not have this problem.
But let's ignore this as I'm injecting calibration data into BDM anyway.
So at the moment that's exactly what I'm doing, copying changes from tuned obd to ori obd. But there are some differences that do not look like map data in 2D but then again they could be switches. More likely to be checksums or maybe programming data. But without the damos I do not know one way or the other, I'm just concerned that I may be replacing data in the file that is not calibration data.