I have recovery.img and dtb.img from android fw foe box plus ledtb.img from ur tree for mxq pro but wouldn't flash into nand.
It boots fine from sd card though.
Again ur 005 build installs in nand fine so something different in librelec 006 build for this mxq pro box.
Possible for u to just add wifi drivers for 8189 ftv wifi in 005 build as this works perfect for this box.
Thanks for ur help.Sent from my SM-N910G using Tapatalk
Same problem for me: with the sd inserted I cannot go to recovery and nothing flash but I resolve in this way: prepared for nand installation as described, switch the box on without sd in, went to recovery, put the sd in and then select "install update from ext"