H4 Alien Frame Type

I’m trying to sort out a new build. Its an H4 Alien 680. The frame is not really and ‘X’, and its not really an ‘H’, so which frame type should I be using?


If the frame has a lot of flex around the roll axis, I would use an H frame setup, so the flex assists yaw control.

I use X-frame type for my Alien. Tried H, but X is more stable with Yaw