Ooh, I haven't tried RTL-SDR on it yet, but I think I'm nearing capacity on what it can do at once lol.
Here's the block diagram for it (in spoiler below). Everything's up and running except the Bluetooth Receiver -> Snapcast (it works on the bench but I don't have the scripting/automation done yet). I'm also adding an SMA connector for an external antenna, but the new base part is still printing. Photo shows it "as is" of this writing.
SSL for the web apps was a PITA since I wanted real certs. Had to make a wildcard domain under my main hobby domain, so all my apps are like "https://{APP_NAME}.mobile.mydomain.xyz/"
As soon as I can get the Bluetooth + Pulseaudio scripting done, I'm gonna try to do a write up and maybe a show/tell post.
Those letters probably wouldn't be very helpful, so it'd basically be a $25,000 dick joke lol.
(Or whatever the grand-prize value is these days)