Found a CEX 1.02 update file the other day, and wondering if I can downgrade my CECHA01 from 4.84 rebug directly to 1.02. Yeah, I know there's no point in doing this, but just want to do it for the good old days. Did some search but all I found are people downgrading to 3.55, not to the lowest firmware. So is it doable? I don't have a hardware flasher and I really don't want to brick my CECHA01.