Tablet Z SGP311 - 10.7.A.0.222 Trouble trying to install CyanogenMod and TWRP - Xperia Tablet Z Q&A, Help & Troubleshooting

Hi, I have a stock Tablet Z on 10.7.A.0.222
I have successfully unlocked the bootloader via instructions on xperia firmware. However I have been unable to root it or install twrp.
I am a complete noob at this but the tablet is running incredibly laggy as stock so want to refresh it. I was using this guide:
https://www.cyanogenmods.org/forums/topic/xperia-tablet-z-cm14-cyanogenmod-14-nougat-7-0-rom/
In that guide I got to 1b which led me to this guide for installing recovery:
https://www.cyanogenmods.org/forums/topic/install-twrp-recovery-android-using-fastboot/
When i try to do step 6 the tablet shuts off and does not go into bootloader mode where I can flash twrp.
Can someone provide direction on what I need to do differently? I have done various searches on this site and I believe there is not a recovery installed in this firmware version or something and that is preventing me from being able to do this step but I am not sure how I get around that.

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cward0625 said:
Can someone provide direction on what I need to do differently? I have done various searches on this site and I believe there is not a recovery installed in this firmware version or something and that is preventing me from being able to do this step but I am not sure how I get around that.
Click to expand...
Click to collapse
Hello!
Look at this thread.

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Rootk1t said:
Hello!
Look at this thread.
Click to expand...
Click to collapse
Thanks for the response, I had referred to this guide too but was unable to get this step to work for me->
- Root. Follow Bin4ry root : http://forum.xda-developers.com/show....php?t=1886460
Download : http://forum.xda-developers.com/show....php?t=1886460
Below is what I get in the command prompt when doing the steps. When I tried option 4 for new xperia root it did not work...it just hangs here:
======================================================================
= This script will root your Android phone with adb restore function =
= Script by Bin4ry =
= (15.06.2014) v36 =
======================================================================
Device type:
0) New Z2 Root Method by cubeandcube (thanks man!)
1) 2014 root (thx jcase for nice pwn binary and xsacha for the exploit)
2) Xperia Root by cubeundcube
3) New Standard-Root (thx Ariel Berkman)
4) New Xperia Root by Goroh_kun (Xperia Z, Xperia V [JellyBean] ...)
5) Old
6) Old-Special (for example: Sony Tablet S, Medion Lifetab)
G) Google Glass Mode (thx Saurik for the ab file)
x) Unroot
Make a choice: 4
Please connect Xperia device with enabled USB-Debugging now to your Computer
Going to copy over some files ...
33 KB/s (442 bytes in 0.012s)
33 KB/s (170 bytes in 0.004s)
13 KB/s (57 bytes in 0.003s)
Starting restore operation, please look on your device and confirm restore!
after that press anykey here in the console
Now unlock your device and confirm the restore operation.
Press any key to continue . . .
After restore is confirmed please look on your device and choose "Service Tests -> Display" in Service menu and WAIT THERE!"
Starting: Intent { act=android.intent.action.MAIN cmp=com.sonyericsson.android.servicemenu/.ServiceMainMenu }
/data/local/tmp/onload.sh ...
Then if I try option 1 instead I get this (although I do not think this is the correct option anyways:
Device type:
0) New Z2 Root Method by cubeandcube (thanks man!)
1) 2014 root (thx jcase for nice pwn binary and xsacha for the exploit)
2) Xperia Root by cubeundcube
3) New Standard-Root (thx Ariel Berkman)
4) New Xperia Root by Goroh_kun (Xperia Z, Xperia V [JellyBean] ...)
5) Old
6) Old-Special (for example: Sony Tablet S, Medion Lifetab)
G) Google Glass Mode (thx Saurik for the ab file)
x) Unroot
Make a choice: 1
Exploit type:
0) xsacha Z2 Tablet Root
1) jcase Z1S Root (make sure to download the pwn binary first from XDA thread!)
Make a choice: 1
Please connect your device with enabled USB-Debugging ...
Copy needed files ...
4106 KB/s (574722 bytes in 0.136s)
6023 KB/s (104576 bytes in 0.016s)
5317 KB/s (2139595 bytes in 0.392s)
72 KB/s (148 bytes in 0.001s)
1024 KB/s (2092 bytes in 0.001s)
4525 KB/s (1109128 bytes in 0.239s)
Beaups and jcase were here
donations may go here, pleaes say what it was for -> [email protected]
Rebooting device, please wait ...
mount: Permission denied
dd: /system/xbin/su: Read-only file system
chown: /system/xbin/su: No such file or directory
Unable to open /system/xbin/su: No such file or directory
ln: /system/bin/su: Read-only file system
dd: /system/app/Superuser.apk: Read-only file system
chown: /system/app/Superuser.apk: No such file or directory
Unable to open /system/app/Superuser.apk: No such file or directory
dd: /system/xbin/busybox: Read-only file system
chown: /system/xbin/busybox: No such file or directory
Unable to open /system/xbin/busybox: No such file or directory
/data/local/tmp/install_tool.sh[39]: /system/xbin/busybox: not found
mount: Permission denied
"If this helped you please consider donating to the original author jcase: http://forum.xda-developers.com/showpost.php?p=53407127&postcount=1004"
You can close all open command-prompts now!
After reboot all is done! Have fun!
Bin4ry
Press any key to continue . . .
Any ideas on what I am doing wrong or what I need to do differently?
I have rooted my phones before and installed different ROMs but something seems to be off here.

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cward0625 said:
Thanks for the response, I had referred to this guide too but was unable to get this step to work for me->
Any ideas on what I am doing wrong or what I need to do differently?
I have rooted my phones before and installed different ROMs but something seems to be off here.
Click to expand...
Click to collapse
forget about root. To install TWRP to FOTA or custom ROM, you don't need it.
Proceed with step 7.

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Rootk1t said:
forget about root. To install TWRP to FOTA or custom ROM, you don't need it.
Proceed with step 7.
Click to expand...
Click to collapse
thanks a lot, I did that, got lineage installed, worked fine, then when I followed the directions to install gapps and rebooted it just keeps loading twrp and not to lineage. I tried wiping and starting over and getting the same thing. Is there something I need to do differently? I used gapps arm 7.1 neon 20181118
thanks again

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cward0625 said:
thanks a lot, I did that, got lineage installed, worked fine, then when I followed the directions to install gapps and rebooted it just keeps loading twrp and not to lineage. I tried wiping and starting over and getting the same thing. Is there something I need to do differently? I used gapps arm 7.1 neon 20181118
thanks again
Click to expand...
Click to collapse
wiping and installing 14.1 did not work, but when i did 15.1 it did. I think I should be set now.
Thanks