No problem Tom. The only thing soldered to the board is the ESCs and battery lead. ESCs plug into the flight controller, and it pulls power from 1 of them, you disconnect the power wires on the BECs on the rest of them. Alternatively, you can run a UBEC and power the FC that way, and remove the...
Tom, here are the pics you asked for, hope this helps!
My old T8UAF (love this thing!), running on a 3s lipo pack.
Front
Back showing the modular TX design, that's a FrSky 2.4 module in it now
Modules looks like this
My Flip FPV quad
Openpilot CC3D flight controller housed in a...