Thanks for confirmation. So if it blocks then trying to update arm 9 from HBL would not work out partially work and possibly lead to brick. Good to know. So sound update arm 9 from 3dsx on aureinand then, use another cfw without block.Yes I too would like to know if firm 0 and firm 1 are blocked without setting an updatedsys nand flag. I have asked in the AuReiNand forum but no clear response. Kindly let me no if you get an answer to this.
Anyways, because it is unknown, I will be using a older version of aureinand when it comes time to update arm9 via 3dsx. I wonder if thats whe that guy bricked his n3ds a few pages back, because he tried to update when firm0 and firm1 was blocked.