[Fire HD 8 and HD 10 General] :
SUCCESS!!!! STANDBY!!!:cool:

C:\dump\adt-bundle\sdk\platform-tools>adb sideload update-kindle-49.5.5.4_user_554206920.bin
Total xfer: 2.00x

C:\dump\adt-bundle\sdk\platform-tools>adb reboot

C:\dump\adt-bundle\sdk\platform-tools>adb install es-file-explorer-4-1-6.apk
[100%] /data/local/tmp/es-file-explorer-4-1-6.apk
pkg: /data/local/tmp/es-file-explorer-4-1-6.apk
Success

C:\dump\adt-bundle\sdk\platform-tools>adb shell
shell@giza:/ $ su
root@giza:/ # mount -w -o remount /system
root@giza:/ # cd /sdcard/Kingo.to.SuperSU/
root@giza:/sdcard/Kingo.to.SuperSU # cp ./su /system/xbin/daemonsu
root@giza:/sdcard/Kingo.to.SuperSU # chmod 0755 /system/xbin/daemonsu
root@giza:/sdcard/Kingo.to.SuperSU # daemonsu -d &
[1] 5558
root@giza:/sdcard/Kingo.to.SuperSU # ls
README.TXT
chattr.pie
install-recovery.sh
libsupol.so
manualsucopy.sh
step0.sh
step1.sh
su
supolicy
[1] + Done daemonsu -d
root@giza:/sdcard/Kingo.to.SuperSU # ./step1.sh
sh: ./step1.sh: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # cp ./su /system/xbin/su
root@giza:/sdcard/Kingo.to.SuperSU # chmod 0755 /system/xbin/su
root@giza:/sdcard/Kingo.to.SuperSU # ./chattr.pie -ia /system/xbin/ku.sud
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/xbin/supolicy <
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/xbin/supolicy <
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/xbin/ku.sud
rm: /system/xbin/ku.sud: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/xbin/supolicy
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/rt.sh
rm: /system/bin/rt.sh: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/install-recovery.sh
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/shipclean
rm: /system/bin/shipclean: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/start-ssh
rm: /system/bin/start-ssh: No such file or directory
/chattr.pie -ia /system/etc/install-recovery.sh <
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/etc/install-recovery.sh-ku.bak <
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/etc/install-recovery.sh
rm: /system/etc/install-recovery.sh: No such file or directory
m /system/etc/install-recovery.sh-ku.bak <
rm: /system/etc/install-recovery.sh-ku.bak: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/etc/install_recovery.sh
rm: /system/etc/install_recovery.sh: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/usr/icu/icusuflag.conf
rm: /system/usr/icu/icusuflag.conf: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # ./chattr.pie -ia /system/usr/iku/isu
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm -rf /system/usr/iku
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/kroot_*
rm: /system/kroot_*: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /sdcard/kr-stock-conf
rm: /sdcard/kr-stock-conf: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm -rf /sdcard/Kingroot
root@giza:/sdcard/Kingo.to.SuperSU #

Okay, so I re-flashed to start new. Airplane mode, adb, etc. etc.

Root via Kingoroot pc app

reboot <adb reboot>

install es file explorer <adb install>

copy King.to.SuperSU to /sdcard/

adb shell

su

mount -w -o remount /system

cd /sdcard/Kingo.to.SuperSU/

cp ./su /system/xbin/daemonsu

chmod 0755 /system/xbin/daemonsu

daemonsu -d &

./step1.sh <I didn't trust how it ran with just 1 line saying permission denied afterward, with all those commands in that script, so I manually issued each and every one, even within the same adb session>

In the script it has a comment that it's ok if 1-2 error out, but I think I had closer to 11 errors total, but still I think it's best to just enter those commands as is, in their entirety but the ones that didn't error or permission out were:

./su /system/xbin/su
chmod 0755 /system/xbin/su
rm /system/xbin/supolicy
rm /system/bin/install-recovery.sh
rm -rf /system/usr/iku
rm -rf /sdcard/Kingroot

Here is the raw adb output log:

C:\dump\adt-bundle\sdk\platform-tools>adb sideload update-kindle-49.5.5.4_user_554206920.bin
Total xfer: 2.00x

C:\dump\adt-bundle\sdk\platform-tools>adb reboot

C:\dump\adt-bundle\sdk\platform-tools>adb install es-file-explorer-4-1-6.apk
[100%] /data/local/tmp/es-file-explorer-4-1-6.apk
pkg: /data/local/tmp/es-file-explorer-4-1-6.apk
Success

C:\dump\adt-bundle\sdk\platform-tools>adb shell
shell@giza:/ $ su
root@giza:/ # mount -w -o remount /system
root@giza:/ # cd /sdcard/Kingo.to.SuperSU/
root@giza:/sdcard/Kingo.to.SuperSU # cp ./su /system/xbin/daemonsu
root@giza:/sdcard/Kingo.to.SuperSU # chmod 0755 /system/xbin/daemonsu
root@giza:/sdcard/Kingo.to.SuperSU # daemonsu -d &
[1] 5558
root@giza:/sdcard/Kingo.to.SuperSU # ls
README.TXT
chattr.pie
install-recovery.sh
libsupol.so
manualsucopy.sh
step0.sh
step1.sh
su
supolicy
[1] + Done daemonsu -d
root@giza:/sdcard/Kingo.to.SuperSU # ./step1.sh
sh: ./step1.sh: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # cp ./su /system/xbin/su
root@giza:/sdcard/Kingo.to.SuperSU # chmod 0755 /system/xbin/su
root@giza:/sdcard/Kingo.to.SuperSU # ./chattr.pie -ia /system/xbin/ku.sud
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/xbin/supolicy <
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/xbin/supolicy <
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/xbin/ku.sud
rm: /system/xbin/ku.sud: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/xbin/supolicy
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/rt.sh
rm: /system/bin/rt.sh: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/install-recovery.sh
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/shipclean
rm: /system/bin/shipclean: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/bin/start-ssh
rm: /system/bin/start-ssh: No such file or directory
/chattr.pie -ia /system/etc/install-recovery.sh <
sh: ./chattr.pie: can't execute: Permission denied
/chattr.pie -ia /system/etc/install-recovery.sh-ku.bak <
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/etc/install-recovery.sh
rm: /system/etc/install-recovery.sh: No such file or directory
m /system/etc/install-recovery.sh-ku.bak <
rm: /system/etc/install-recovery.sh-ku.bak: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/etc/install_recovery.sh
rm: /system/etc/install_recovery.sh: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /system/usr/icu/icusuflag.conf
rm: /system/usr/icu/icusuflag.conf: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # ./chattr.pie -ia /system/usr/iku/isu
sh: ./chattr.pie: can't execute: Permission denied
126|root@giza:/sdcard/Kingo.to.SuperSU # rm -rf /system/usr/iku
root@giza:/sdcard/Kingo.to.SuperSU # rm /system/kroot_*
rm: /system/kroot_*: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm /sdcard/kr-stock-conf
rm: /sdcard/kr-stock-conf: No such file or directory
1|root@giza:/sdcard/Kingo.to.SuperSU # rm -rf /sdcard/Kingroot
root@giza:/sdcard/Kingo.to.SuperSU #

sideloading supersu

C:\dump\adt-bundle\sdk\platform-tools>adb install "eu.chainfire.supersu_2.79-SR3-279_minAPI7(nodpi)_apkmirror.
com.apk"
[100%] /data/local/tmp/eu.chainfire.supersu_2.79-SR3-279_minAPI7(nodpi)_apkmirror.com.apk
pkg: /data/local/tmp/eu.chainfire.supersu_2.79-SR3-279_minAPI7(nodpi)_apkmirror.com.apk
Success