Updating Xiaomi Mi Router 4AC after OpenWRTInvasion - how?

I ordered a Xiaomi Mi Router 4A 100M and got a Mi Router 4AC 100M (NOT gigabit) .

After several days of bricking, reflashing, down grading the firmware, installing virtual box and ubuntu and following @hoddy tutorials, I finally got to telnet into it and installed this version (@zorro I think):
OpenWrt 19.07.2 r10947-65030d81f3 / LuCI openwrt-19.07 branch git-20.057.55219-13dd17f

Phew

Now it seems to work fine --I can use the luci interface to make changes see stats etc.

I could not find an answer in the 1000 message long forum post on the 4A/gigabit. And I spent a lot of time trying. And learning a vast amount.

I see there is a version 21.02.02 available for the Mi Router 4A (not 4AC) on the openwrt downloads page:
https://downloads.openwrt.org/releases/21.02.2/targets/ramips/mt76x8/openwrt-21.02.2-ramips-mt76x8-xiaomi_mi-router-4a-100m-squashfs-sysupgrade.bin

will that work on my Mi R4AC 100M? I am assuming so because it has the same "mt76x8"

If it will work, should I update via Luci or should I still use openwrtInvasion and Telnet/Curl to install the update?

Thanks

It's never a good idea to install firmware for another router.

You run the risk of bricking it permanently.

Why not return it and get the router you ordered?

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fyi, the photo of the rear of the R4A in the wiki page actually quotes 'Mi Router 4A', model: R4AC
https://openwrt.org/toh/xiaomi/mi_router_4a_mir4a_100m#photos

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True - but over in the developers sections there is mention of differences. Thanks.

As does the DeviWiki info -

https://deviwiki.com/wiki/Xiaomi_Mi_Router_4A_100M_(R4AC)

Looks like this thread has been cross-posted in the Developer forum -

Based on these and @Boromini over in developers, I held my breathe and upgraded to the latest xiaomi mi4a 21.02.2 sysupgrade.bin. And voila - it worked.

Thanks

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