RE: Need help setting up Elevons on SD-10G
You can do this in AERO mode. Just choose DELTA in the Aileron option in the model type menu. Page 31/32 in the manual explains this and references elevons in the aero programming table on page 32. Once chosen, all the mixing will be done automatically for you. You can then refer to the Surface menu to see exactly what channels to plug your servos into your receiver so that everything works as expected.