u/HopefulAd8096

I have a Gibson J45 and I am wanting to try tuning down a full step. I tried it with 11's on it and it wont work with 11's. I know I will at least have to move up to 12's and maybe possibly 13's. The issue with 13's is I have read things from Google that say the nut slots will need to be cut deeper. Does anyone have any experience with this issue? I am no expert but I think the nut slots will be find. Thanks for any advice.