I wanted a try at GS20, because I can not read the Transmision.
I do not know how to correct for the *. ODA the checksum.
In WinKFP there is an option, because you can get the correct checksum.
Do not know if that works.
If you make an update with WinKFP, for example MS43 ....
From version 430037 to 430037, it only writes to memory. (4 minutes)
From version 430037 to 430066, then it writes memory and system. (25 minutes)
With the same version, only the memory is written.