Install from magisk modules
Use rootexplorer to access
/data/local/AIK-MOBILE
Add boot.img or recovery.img and tap unpackimg.sh
Exit the folder and return to see the files.
Edit the files (eg to add a new Image rename Image to boot.img-zImage and insert in split-image folder)
Tap repackimg.sh

Add boot.img or recovery.img and tap unpackimg.sh

How to Install Stock Kernel & dtbo

1. Extract boot.img and dtbo.img from the ap section of your firmware.
2. Insert dtbo.img into the dtbo-installer.
3. Reboot to recovery.
4. Flash boot.img into the boot partition.
5. Flash the dtbo-installer

@physwizz
Thanks to @topser for the zip

physwizz-a20e 1.72 GSI or OneUI
@physwizz

-Most securities disabled
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-CPU overclocked and underclocked
-Big: 208 - 2184
-Little: 208 - 1690
-Extended battery life
-Works with Magisk 19.3 - 21.4
-Spectrum support enabled
-mtp enabled

https://github.com/physwizz?tab=repositories

physwizz A20 (SM-a205xx)
For OneUI or GSI (Q or R)

@physwizz

-Samsung securities disabled.
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-SE linux enforcing
-CPU overclocked and underclocked
-Big: 208 - 2184
-Little: 208 - 1690
-Extended battery life
-Works with Magisk 19.3 - 21.4

https://github.com/physwizz?tab=repositories

physwizz-a20e 1.70 GSI or OneUI
@physwizz

-Most securities disabled
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-CPU overclocked and underclocked
-Big: 208 - 2184
-Little: 208 - 1690
-Extended battery life
-Works with Magisk 19.3 - 21.4
-mtp enabled

https://github.com/physwizz?tab=repositories

physwizz a30 stable
@physwizz

Tester @krithik

-OneUI or GSI
-Most securities disabled
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-SE linux enforcing
-CPU overclocked and underclocked
-Big: 312 - 2080
-Little: 208 - 1690
-Extended battery life
-Works with Magisk 19.3 - 21.4
Also works without magisk

https://github.com/physwizz?tab=repositories

physwizz a40 stable
@physwizz

-OneUI or GSI
-Most securities disabled
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-SE linux enforcing
-CPU overclocked and underclocked
-Big: 312 - 2080
-Little: 208 - 1690
-Extended battery life
-Works with Magisk 19.3 - 21.4

https://github.com/physwizz?tab=repositories

physwizz a40 R
@physwizz

-OneUI
-Most securities disabled
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-SE linux enforcing


https://github.com/physwizz?tab=repositories

Installing Custom ROMs

@physwizz

1. Backup calls and texts using sms backup and restore .
2. Reboot into twrp.
3. Backup boot, data, system, vendor, product to sd card in case you want to go back to your current system
4. Wipe caches, data, system
5. Install Rom and your kernel
6. Format data (not just wipe) and then Install dmverity
7. Wipe caches. Don't reboot
8. Go to main menu. Select reboot. Select recovery
9. Reboot to system
10. Wait a long time (up to 10 minutes?)
Select your language
11. Restore data from smart switch or Google restore
or
Skip through setup and Restore data from twrp
12. Install Magisk if you want root
13. Install dmverity (in case step 8 didn't work)

If you need to install GApps
14. Wipe, advanced wipe
15. Select system, repair or change
16. Resize file system
17. Install GApps

To backup ROM before you go to a new system
Backup boot, data, system, product, vendor

physwizz a40 Android R
@physwizz

-OneUI or GSI
-Most securities disabled including knox
-CPU Governors: conservative, ondemand, userspace, powersave, interactive, performance.
-Interactive is default governor
-SE linux enforcing
-CPU overclocked and underclocked
-Big: 312 - 2080
-Little: 208 - 1690
-Better battery life
-Works with Magisk 19.3 - 21.4
-Spectrum support enabled

https://github.com/physwizz?tab=repositories

Using AnyKernel3

1. Download AnyKernel3-Master.zip from here https://forum.xda-developers.com/t/dev-template-anykernel3-easily-mod-rom-ramdisk-pack-image-gz-flashable-zip.2670512/
2. Unzip it in Linux
3. Put Image and/or dtbo.img into the Anykernel3-Master folder
4. Modify the anykernel.sh to add your kernel's name, boot partition location, permissions for any added ramdisk files, and use methods for any required ramdisk modifications (optionally, also place banner and/or version files in the root to have these displayed during flash)
5. Open terminal
6. Navigate to the AnyKernel3-Master folder.
7. enter
$ zip -r9 My-Kernel.zip * -x .git README.md *placeholder
8. My-Kernel.zip is created inside the AnyKernel3-Master folder.
9. Transfer the file to your phone and flash from TWRP

My CRB debloat list
If you debloat manually, don't delete files. Just move them to a new folder in case you want them back.