I have built many whoop drones with different FC types. The BETAFPV F4 FC 1S Brushed Flight Controller goes well with my DIY build using the Brainbrain Cockroach frame. The main downside is that there are no buzzers (I have buzzers on all my other builds). I had to remap one of the TX/RX pins for the Betaflight buzzer function, but the current draw is so low that the audio is barely audible at 10ft. Incorporating a transistor circuit didn't work either (and added weight). Given the cost of this FC it's a shame not to include buzzer pads which I think are essential for outdoor flying. There are cheaper FCs with built-in buzzer pads.