Finally someone who also believes in using multiple clamps. The setup looks great Dash!
I worked my way up to 4 clamps, gained about half a cm in 3 weeks, but I had to stop because my skin started bleeding. I'm now back at it, but of course starting slow with only 2 clamps.
I don't think it's a good idea to start that young. The growth spurt could positively support Penis Enlargement gains, but on the other hand one cannot forget about the mental side effects this whole procedure could have on an adolescent. As adults we know that this shit isn't that serious, but...
No device will beat your hands in jelqing. When you're jelqing you're not just moving your hand from the base to the top, you increase the tension and adjust the grip with every cm you go up. No way this device can do nearly the same job as your hand.