It wouldn't let me install it until I uninstalled the previous version. And once installed it wanted me to install the same firmware I had installed not long ago......strange.
Came across this thread after starting mine with the cover on. Thought for sure I had damaged the gimbal motors but everything seems fine after a restart. This thread did put me more at ease about the mistake, something I hope to not repeat.
I've seen them on ebay
https://www.ebay.com/itm/Genuine-NEW-Autel-Robotics-Evo-Front-Left-Motor-Spare-Replacement-Part/283650414805?hash=item420ae1d8d5:g:XXwAAOSwAS5dB93w
Thanks for the heads up. Ordered the ND/PL 4, 8 and 16 3 pack and received them today. You can rotate the front of the
lens to adjust the amount of polarizing you desire so basically 2 in 1 filters.