Spent a couple of hours updating the 9020 SFF, I used the HackinDROM App to update OC to 0.7.2 then updated Big Sur to 11.5.2. I also installed my fan less Nvidia MSI GT 710, everything is working beautifully, I even have all USB ports working.
Update: After installing Big Sur and was happy with the performance and stability, I immediately replaced the SSD with a 500GB Samsung 860 EVO. Connected the old SSD, copied the EFI to the 500GB SSD and ran Big Sur installer from the old SSD. After installation I disconnected the old and restarted from the 500GB SSD, 1st time, fast and solid.
View attachment 526952