Ok so the first thing I did with my new switch, was to boot using the SX OS injector and do a full nand dump of version 4.1, I'm now looking to update official firmware to 6.2 using choidujournx. To do that I'll need to boot into a CFW, but then wonder if I need to do a fresh nand backup at that point for 6.2 or if I'm fully covered with just my 4.1 backup? I'm just wondering if the 6.2 new backup after booting into CFW would potentially be tainted if that makes sense? Thanks for any help, I can see some people have restored really old backups ok and then bypassed fuse checks etc