Penis stretching device

So I finally finished building my stretcher and it's pretty crappy. It works though. How much tension do I need to put on my penis.

I can stretch my penis but not even close to as hard as when I do it manually. Im not exactially how sure hard the device is pulling but it does pull me past the point of being able to stretch further.

Any info is appreciated :D

Stretch to the max for an hour. Find a more comfortable stretch for sustainability. More time at max possible tension (a fine balance) = more gains. Good luck.