Now that I've worked with these pencils for over 3 years now, I have found other techniques with these pencils that yield better results than what you will see in this video. For example using a blending marker will help the pencils blend together flawlessly.
This Zendala is one I am very happy with. There's a red and orange mandala that was very similar to this purple one that I didn't record the drawing. Here is a photo of that mandala and the video of the purple one.