After my good experiences using Arducopter on miniquad flight controllers in my Everycopter Y6 & flat hex, I decided to rebuild my 680 quad by ripping out its Pixhawk & replacing it with another Matek F405 STD. The space saving meant that I could fit everything (except the GPS) between the main body plates, resulting in a much neater build that's also more flexible & easier to use as I can just strap batteries to the body on top like a miniquad.

I also took the opportunity to swap the arms front/back, because they were backwards before. The way that I originally wired the motors means the arms no longer close all the way, but it's good enough.

I ditched the FPV gear as I never used it. I have a FPV pod I can strap on if a live video feed is really required. All flight data I might need (battery, number of satellites, etc.) comes down via SmartPort telemetry to Flight Deck, so OSD is superfluous.

Not my neatest build, but I'm beginning to accept that I have too many projects on the go these days to strive for perfection in everything!

See my previous build here --> https://rotorbuilds.com/build/12718