RE: Help no elevator on my new eurofighter
The DX5e has delta wing (elevon) mixing.
One elevon servo goes in the aileron channel. The other goes in the elevator channel.
I suspect you have the two elevon servos plugged into the two aileron connections on the AR500 receiver. That won't work.
HUGE HINT: If you can't get the elevons to go in the right direction, no matter how you change servo reversing, try swapping the aileron and elevator plugs at the receiver.