I am trying to get a scratch built v-tail sailplane set up. (My first v-tail)

I started to set up the radio using the instructions for v-tail but did not like having to use both right stick for elevator control and left stick for rudder control. I want control on the left stick for both.

Soooo, I reset the thing up using the Elevon feature to mix the v-tail. Now it flies and I am controling it from the one stick, but in a turn the nose drops because with both ruddervators moving the same direction at the same trow for that direction, as it turns the inboard tail is more horizontal and giving an actual "down" throw causing the bird to dive. Harder the turn, harder the dive.

I want to set it up to where when one ruddervator is turning the plane, the other is either not moving, or not moving as much to avoid this condition.

What can I do to set up the mixing to give me what I want? Are all v-tails set up to use both sticks to control? Will it make any differance in my present problem?

I would like one stick control of the tail without the nose dropping in turns.