ORBI RBS750 no longer stable in v4.6.3.7 - Possible downgrade assistance

I'd actually tried most of these options as I'd seen some of the previous posts and started trying everything out of desperation. I've sort of reached a point of a usable point, although probably not the optimal situation. 

the router seems to be stuck on the v4 firmware, but I was able to downgrade both satellites to v3.18 and after a factory reset they connected up and are working normally. So basically I have two different firmwares running, but my speeds are actual normal and the coverage is stable now. 

So, while definitely not a perfect option for anyone else stuck with a non working system after v4 you can

1. Go to the RBS750 support page and download the latest v3 firmware (I used the v3.18)

2. Plug into each satellite with Ethernet and manually load the downgrade and run it

3. Factory reset the router and set it up the satellites and internet

4. On one of the satellites I needed to do a factory reset on the satellite as it had a different login password after the downgrade and was showing solid purple. 
5. I also set static ips for both of my satellites

Its not 100% perfect as I occasionally see out of sync messages in the logs, but the satellites themselves powered on and connected as blue and after a minute or two the light went out and they both have ~30 devices hooked up to them now with the router having another 40. Everything is getting decent speed tests and is able to work on the network. It's been stable for over 2 hours now, so I'm going to consider this a win as I had at most 5 mins of stability for the last 24 hours. 

I'll probably leave my network in this split firmware state and hope that netgear can release some updated firmware that doesn't nuke the satellites soon!