This is just me, but have you ever try the rope's alternating wave challenge for your penis? I'm just testing this on myself while using the SiliStetcher2. While under tension with an elastic band, I use my feet to cause an elastic band wave to spring the penile tissue into an alternating wave, creating pure dynamic tension ranging from 2lbs during peak and 12lbs during valley. This alternating wave lasts within 1.5 seconds. It's like an extender heaven in 10 minutes. I've only use the period of 10 to 15 mintues per session before slapping on my ADS at a constant traction force afterwards.
Mind you, if you use this, and your band happens to slip off the connection point, well, your crotch won't be thanking you.