You can configure Hekate to autoboot the option you want.Is there a way to hide "boot stock" and "boot cfw sysNAND" in hekate so I don't risk using those by mistake and thus end up "staining" my clean sysNAND?
Moreover, if by mistake I install something to the nand and not to the micro SD when I'm using emuMMC, will this "stain" sysNAND or it won't be detected since I did it while in emuMMC?
Installing something directly to the emuNAND will not dirty the sysNAND.