Looked at your build thread! Very interesting!
Those antenna on the 3DR radios, I would change (at least the airborne one). A decent strike and it will rip the SMA connector off the pcb.
Wondered why you decided on using a six way switch! Do you think it will be easy to know what flight mode you are switched to?
You say the current sensor on the Power module has failed before! Is this even when drawing much less than the rated 90 amps?