then you already compiled coreboot.rom yourself since the release of memloader with your own sourced copy of google's memory trainer, and always had these speeds.
if you are trying to somewhat verify a backup/rawnand via HacDiskMount, you should do that to all the partitions that take in a bis key (bis key idx mentioned in mount dialog), also the button is called Test not verify.
use hex workshop (or dd, whatever can open a physical disk and restore raw images to it) to do full nand restores through memloader, no need for HacDiskMount which is a partition mounter/decryptor/cryptor which you need none of if just restoring RawNand/Boot0/Boot1 (or you can restore...
yes you would have to zero out the ENCRYPTED USER partition, then use guiformat with quick fat32 16KB cluster size (run HacDiskMount as admin if you cant see the mounted drive letter in guiformat)
then put all the files back. is it worth it ? probably not.
you actually cant zerofill the partitions because after encryption the zeroes become random data == basically uncompressible.
if you want lean backups then just backup the files on mounted partitions instead of the partitions themselves ? like make a folder called USER and copy everything from...
biskeydump v7 is out for those who need to get their tsec/bis keys while on 6.2.0, also adds option to save keys to a file on microsd, binaries at https://switchtools.sshnuke.net/ and source at https://github.com/rajkosto/biskeydump)
the lull is a chance for everyone to swap to official atmosphere to give it its deserved place in the spotlight, make use of it (bigger things are in the works for this, dont want to release tiny updates being in lockstep with atmosphere all the time)
6.0.0-5.0 is now supported by ChoiDujour PC (every firmware is always supported by ChoiDujourNX, its not what this thread is about)
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when restoring, you should restore boot0 too, since that's what determines how many fuses to burn.
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yes, you can go from any firmware to any other...
ChoiDujour PC is supposed to be used for recovery of destroyed SYSTEM partitions/etc (ill update it when i have the time, soon), if your console is working use ChoiDujourNX