How about - do nothing.
Just like my E-flite retracts in my Savex L-39, I retract them for transport/ storage, and at power on, if they are 'out of sequence' with the Tx control, I just have to cycle the Tx switch to get it sync'd up and then they operate normally.
That also keeps full control with the pilot, as unexpected movements at power on are not great due to the possibility of damage.
Paul