Be sure to use the energy from the rechamber to make your 90 degree turn. Show that solid balance in the flamingo before setting the foot down into your side horse stance.
Use the rotation of the body to create tremendous power in your side elbow. Make sure to get nice and low on the sweep and finishing strike. For a side by side view, go to 02:17. Minus the initial block and strike, this can be a great technique against a side headlock attack.
The twist for the roundhouse goes in front of the base leg. This exposes the centerline (and groin), but it allows the hips to open for power generation.