I think there is a setting in the transmitter (remote controller) that you have to switch to ibus. This is just a thought... I might be remembering it incorrectly. I have been on ibus/sbus for quite a while.. and I'm not around my Flysky transmitter to take a look at the moment.
Okay I've got the ground and positive wires soldered to the row on the outside row and the ibus wire soldered on the inside to "rx2". So I should just be able to go into BF config tab and turn on "uart 2" and be good to go? Am I doing something wrong here?
(The solder job looks crappy I know, once it's working I'll clean it up).