I'm trying to get up to speed with RID on my Mavic 2 Pro. I'm using the original stock controller. It seems that there is no way to update the firmware on this controller. All the update instructions refer to a Smart Controller and I see reports of people with the Smart Controller are successful in implementing RID. For the time I've bought a Potensic RID-916 which is working fine, but I'm looking at purchasing a Smart Controller on eBay which may be a better option in the long run. Any advice?