Hi, I am about to setup A9LH and I read that you should remove any patches made to the TWL_FIRM and ABG_FIRM before downgrading to 2.1. I used a few of the patches from that iso site awhile ago, and now I dont know how to remove them. Any help would be greatly appreciated! Thanks. Oh and I have a N3DS with 9.2 Sysnand and 10.7 Emunand (luma3DS).