Gary,
When you flew with K45...
Did you separate red wire from thr cable (RX<->ECU)
So you could run FW model at 5.5V BEC and ECU at 6-8V(2S rx LiPo)?
Because thats what manual says is max for fw(5.5V) but k45 does not work under 5.7, (prefers6-8V)
Thanks