since ArrowOS ceased to provide updates, I've again created my own one, based on the android-security-11.0.0_r63 tag provided by Android Source.
Android security 11.0.0 release 66 contains the security patches of April 2023, so I bumped the version string to 2023-04-01. Actually, I want to give credits to ArrowOS here as well, as some of the patches made public by earlier Android release have been incorporated into ArrowOS months ago already.
I've compiled that state locally , transferred it to the phone using
adb push Arrow-v11.0-sanders-UNOFFICIAL-OTA-20230401-VANILLA.zip /sdcard
and installed it using TWRP.
Following the restart, I flashed the latest NikGapps-basic-arm64-11-20230418-signed.zip as well.
The last couple times, the phone had trouble upon the first restart, but this time this problem did not occur at all.
Feel free to download and use - but please, no responsibility is assumed.
If you look closely, you'll notice the new webspace, I've created for this, you'll also get a more detailed changelog there.
Again, help is very welcomed to migrate sanders to Android-12.1, which I haven't been able to compile yet. Also, this April 2023 image continues to use outdated kernel-3.18, since I haven't been able to update to a more recent 4.x or 5.x version (clang fails on too many warnings). But I've updated the Kernel using some of the updates for April 2023 - the others relied on a way too newer kernel version.
Feedback is wanted as well, since I'm still quite new to this business.