Looking good, Andy.
I have no idea whether this applies to your weird fandango esc or not, but it looks like alot of my problems with motors and esc's dying was a feedback loop going through the kk2 board from the esc's. The kk2 gets its power from the bec circuit on esc no1, so this is the only one that needs to have positive and negative wires.
After changing from this:
to this:
I've had no problems. 30ish flights in so far, and it's working well. Got some more 3s cells coming very soon, as 8 mins at a time just isn't enough!
Thinking of moving the receiver under the top deck to free up some space. Not sure what I'm going to put into that space, but...