Having decided to bow out of the Birthday Challenge, I spent some time on the quads yesterday.
Firstly, I have a proper replacement motor for the Croc (7 days from order to delivery from Banggood, CN) fitted. It seems to be OK, but I’m getting some odd behaviour on the bench:
This is in Acro mode. I’ve managed a brief hover test indoors ( 
) but the runaway doesn’t seem to happen until you hit around 50% throttle, so I guess I won’t properly know if it’s an issue until I’ve done some outdoor test flights. Anyway, the side-effect of this is that I’ve replaced the XM+ receiver in the Croc.
So onto the Nazgul…
I fitted the XM+ receiver but still failed to bind. In truth, I expect it to be “pre-bound” thanks to using it on the Croc, but I needed to rebind after putting it back on the Croc, so maybe it loses its binding when you mess with it. 
@notveryprettyboy asked about ports and config in BF, and @SirGunner asked about the RX UART.
These are the same as the Croc for UARTs 1 & 2, and as specified in the SUCCEX-E F4 V2.1 wiring diagrams for “use another transmitter”.
I’ve actually screen grabbed most of the BF setup in this document, should there be anything else any helpful soul might be interested in. 
For 12 quid, even though I didn’t really have any joy with the XM+ on the Naz, I am tempted to just get another one because I know that it should work and I can definitely rule out the RX being an issue.
Unfortunately I have a gig this afternoon, so I won’t necessarily have a massive amount of time to mess about with it.
I did change the on-board LEDs from green to yellow though. 
