Great, thank you NiLuJe! And yes you're right, I did mean 90C6 (typo, think I took a look at the final digits being CN
)
Ok so, jb -> hotfix -> update to fw5.7.4 -> KUAL + MRPI etc. -> other custom things. Got it
Actually, I think I'll jb -> hotfix -> KUAL + MRPI etc. -> update -> other custom things, just in case KUAL doesn't work for any reason and I lose the chance to start over.