Oh yeah, definitely don't update SysNand or you'll have to re-downgrade it. You shouldn't have to do this anyway: It has nothing to do with downgrading emunand to 2.1, which will be flashed to sysnand anyway.You mean updating the sysNAND?
EDIT: By the way, if you have any games in SysNand, make sure you back up your save files for those games after you finish Part 4. You'll be overwriting your SysNand after you get your OTP and your SysNand games won't read anymore and you'll have to re-install them + the saves you backed up.
Last edited by CrispyYoshi,