This thing is a bad idea with props. Don't build it, and definitely don't ask me for help with it.
I'd love to see your blackbox, though.
I printed the top and bottom plates out of PA6-GF, the middle with PETG. PLA would probably work until you crash once. 1204.5 motors, 4s, 5022kv. It flies - that's about all I can say.
Made for nano cam.