If by chance anything goes wrong, topjohnwu has also graciously provided a stock ramdisk image as an attachment that you can flash. (xda-developers.com)
J700f confirmed got nougat because tomorrow i checked s5 kernel source and i found some j700f files there that mean j700f confirmed got nougat in 15 days if no nougat for this device Download dna rom on xda already nougat offical port for j700f and today i booted android 7.1.1 with my nougat kernel and j700t rom and ramdisk files @deepanshu77 = telegram id to contact me about nougat (sammobile.com)
Although the Nook Tablet can boot from the SD card the bootloader is signed and so only official Barnes and Noble kernels and ramdisks can be ran. (goodereader.com)