duck is super body specific don't copy what you see others doing you really need to dial it in for your self.
This image is a good one to follow, you might find it takes a bit of adjusting in your riding to get use to the new stance but after I adjusted to it to it felt stacks better along with better control of the edge and no knee post session soreness. I also found going too wide in your stance will negatively effect your edge control so pick a stance that matches your shoulder width for a start.