You would be able too if you fixed your o3ds using a hardmod and then followed method 1. You could also do it if you had a nand backup of the o3ds and extracted the seed from it but I do not know how to do this.
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Question i have a banned 2ds hacked, and i want to unban it using my O3ds that it is not hacked ("it is Brick" when i open it, it will power on the screen menu but when you play it will turn off blanked) i think it happen when we hardmod and we do something wrong, is it possible that i can transfer my local friend code seed b there? thanks! i hope you understand what i write