Some more links:<p><a href="https://community.zyxel.com/en/discussion/32423/zyxel-networks-access-points-now-support-openwrt-based-customized-software" rel="nofollow">https://community.zyxel.com/en/discussion/32423/zyxel-networ...</a><p><a href="https://warranty-waiver.zyxel.com/docs/Zyxel_OpenWRT_SOP_v1.1-202600303.pdf" rel="nofollow">https://warranty-waiver.zyxel.com/docs/Zyxel_OpenWRT_SOP_v1....</a><p><a href="https://warranty-waiver.zyxel.com/" rel="nofollow">https://warranty-waiver.zyxel.com/</a><p>They do require waiving warranty rights, though.