refreshed and experimented with a few commands in libreelec. Had to use ai a bit to refamiliarize myself with kodi via linux. Two commands that work really well during testing were
alt S to bring up settings when skins are broken due to piers 22 builds. and skin shortcuts v3.
The other is "systemctl restart kodi" or "reboot" via ssh. Those kept me out of trouble. Easier than editing the config back to the default estuary skin.
next step, since i am only testing and have not inserted this in my avr chain, I just have the Pi 5 connected to the valerion projector. Sound through the speaker wasnt really doing it for me. While it is not atmos, and no I dont use ARC, I was able to set up BT pairing with the projector to my Denon AVR ....albeit since its a much older denon avr3300w i had to compensate the BT delay in kodi to 1.5 ahead give / take. I set it as default for sync and everything is near perfect now. Turned off ARC> and the shield remote volume works via PCM to the BT speaker. All seems to be working well on that front. I have restarted kodi, rebooted kodi, played atmos streams, dts-hd , truehd, dolby eac3 5.1 etc. Everything syncs at 1.5 with passthrough turned off. A unique situation but helps in testing. I swear the pi5 libreelec video output is better than the shield sans dolby vision. HDR10, 1080p, its sharp. and its pretty easy to see on a projector at 120"
I am looking forward to the next build and where how this progresses forward.