I can't for the life of me get CG31 (baseband) flashed. Ends in an error EVERY single time, and I've tried around 10 times now.
On a related note, I split the SBF file with SBFCodec and I'm thinking of trying to delete the firmware codegroup (CG42). This should in theory leave the linux partitions alone and just flash the baseband. I'm not sure what all the other codegroups stand for so I'm just leaving them intact.