I am using those cheap chinese extenders, and there is no way to tell how much tension you pull on them, that I know of. Only indication I can give is my flaccid is around 5 inches, I stretch to 7 inches. My erect length is 7.5 inches. Is that enough?

I have choose not to stretch to far because I don't want to get blisters / burn. And also the more comfy, I can put in 8 hours a day.

I know some guys say you will only see gains if you stretch past your erect length, has anyone gained stretch just under you erect length?