[OnePlus 5 & 5T Cross Device Development] Oblias:
I have tried for over an hour and a half to get this rom flashed on my OP5 cheesburger, but it's just not happening, so I thought I'd see if anyone had any suggestions for me that I might not have thought of. I have been flashing custom roms since the OnePlus One first came out, so it's not like I'm a newbie at this whole thing, but I tell you, I feel like one right now!

I'll start with the list of files I'm using, and we can go from there. My recovery is twrp-3.3.1-x_blu_spark_v9.101_treble-op5_op5t. The files I have been flashing are:

Cheeseburger_firmware_9.0.10.zip

Xtended-cheeseburger-20200120-XQ-OFFICIAL-Release-v5.5.zip

open_gapps-arm64-10.0-pico-20200116-BETA.zip

Magisk-v20.3.zip

No Verity Treble 4.0.zip ( I also tried Universal DM-Verity and ForceEncrypt Disabler (2019-12-27).zip and xXx-No-Verity-Treble_v4.zip)

I am coming from the theOne5OS.9.0.10-PIE.Aroma (OOS based) rom with 9.0.10 firmware, and my internal storage is decrypted already. I did an adb pull /sdcard/ to my PC so that everything is backed up.

OK, that should take care of the questions about what files I'm using, and what OS I'm coming from. Now, here are the methods I've used to try to get this rom up and running:

1) First time, because I was already decrypted, I did not format internal data. I did wipe Dalvik/ART Cache + Cache + System + Vendor + Data, then flashed the 9.0.10 firmware, the rom, open gapps, magisk, and No_verity_V4. Wiped Dalvik/Cache and rebooted. All I got was the regular vanilla bootloop, over and over.

2) Back in recovery, the second time I did format internal data. I wiped Dalvik/ART Cache + Cache + System + Vendor + Data, attached my data cord, and transferred over all the above listed installation files. Then I flashed the 9.0.10 firmware, the rom, open gapps, magisk, and No_verity_V4. Wiped Dalvik/Cache and rebooted. This time, I got a bootloop to the bootloader (fastboot) where it just waited for further instructions.

3) Back in recovery, I again formatted internal storage. I wiped Dalvik/ART Cache + Cache + System + Vendor + Data, attached my data cord, and transferred over all the above listed installation files. This time I flashed the 9.0.10 firmware, the rom, open gapps, but did NOT flash magisk, and finally No_verity_V4. Wiped Dalvik/Cache and rebooted. This time, I got the vanilla bootloop over and over, once again.

4) Back in recovery, and this go round, I again formatted internal storage. I wiped Dalvik/ART Cache + Cache + System + Vendor + Data, attached my data cord, and transferred over all the above listed installation files. Now I flashed the 9.0.10 firmware, the rom, open gapps, magisk, but did NOT flash No_verity_V4. At this point, I didn't much care if the phone was encrypted or not, so that's why I didn't flash no_verity. Wiped Dalvik/Cache and rebooted. Well, you guessed it, another boot loop, but just once to fastboot only.

5) I'm pretty much out of ideas at this point, so the next two times, same routine, but I tried one of the other no_verity files I listed above. Results were the same, just a bootloop of one sort or the other.

I ended up pushing all my internal storage data back on to the phone after doing another internal data format, and then restored my nandroid of theOne5 Pie rom that I've been running.

Now, after all that, if anyone is still reading all this, would you have any suggestions that I might have not thought of? It makes no sense to me why I cannot get Q installed on my OP5. I've never run across this before, so any help would be greatly appreciated! TIA.