If have a 3ds/2ds frimware between 9.3-10.3. ,I have old 9.2u full zip can I just use safetupdate and downgrade ,or do I have to do extra steps. I've downgraded a old 3ds on 10.3 before I would like to know if it would be the same as 10.3 downgrade on 9.3-10.2?