No CGNat, public IPv4 assigned to my WAN interface - I've maxed my USG-3 throughput at quiet times:
Insane, I was wondering how much more speed I might get with an external antenna... now I know! I didn't see in your posts that you're using an antenna so you must be pretty close to a mast?
When you say public IP4 is assigned to your WAN interface - do you mean the WAN interface of your router? That's the part I can't get to work.