One thing to look for with Lansky: They made a new clamp that has two pieces of rubber in it. That clamp is terrible. Make sure you buy one that doesn't have the rubber and use a small piece of electrical tape to protect the blade like in the video above.
I've seen that system before. Maybe on DX or some other chinese site. I know the Lansky system works perfectly:
http://www.amazon.co.uk/Lansky-Deluxe-Knife-Sharpening-System/dp/B000B8IEA4/ref=sr_1_1?ie=UTF8&qid=1446041878&sr=8-1&keywords=lansky
http://www.amazon.co.uk/Lansky-LM009-Sharpeners-Universal-Mount/dp/B000B8L6NG/ref=sr_1_5?ie=UTF8&qid=1446041878&sr=8-5&keywords=lansky
https://www.youtube.com/watch?v=ZlI5PaXsfOk
One thing to look for with Lansky: They made a new clamp that has two pieces of rubber in it. That clamp is terrible. Make sure you buy one that doesn't have the rubber and use a small piece of electrical tape to protect the blade like in the video above.