Here's the before picture. The mainframe was cracked, and more importantly the motherboard wouldn't bind.
Here's the unit with the motherboard removed. The four screws come out pretty nicely.
Here's the repaired frame. It took a bit of jiggling to get the arms to seat properly.
And all put back together! It flies as nicely as it did before on my desktop testing. I replaced my V1 board (which has an accelerometer) with a V2 board (which doesn't). I'll see how well it flied in real life and see if I want to get a V1 replacement board. They're more expensive because of the accelerometer.
Here's the wiring diagram for future use.
