Just wanted to give everyone a heads up, as the AX3000T deal was posted here a while ago- unfortunately the AX3000T is no longer compatible with OpenWRT as Xiaomi has made a silent hardware revision. I spent around ten hours trying to get it to work but if you have firmware version 10.84 or above consider yourself out of luck.
See the forum for more information:
https://forum.openwrt.org/t/openwrt-support-for-xiaomi-ax300…
Darn hate that…. I'm sorry for your loss….
What's the next best router to use now?