As old is this thread is I don't know if the guy(s?) from E-flite are still posting/reading in it, but if they are I have a suggestion...

Having to "reboot" the 4-in-1 unit to make rudder/throttle mixing changes take effect is a PITA. I know I turned the darn thing off/on at least 25 times before I got the mixing "just right".

If possible I would suggest getting rid of this "feature".