Okay I am going to talk from my experience and make some suggestions. I also have a penis extender from x4 labs and I will admit it was the worst and I mean the worst decision I have ever made. I was extending for 8+ hours a day for quite a while off and on for over a year. I will tell you for a fact my EQ was affected in a negative way, to the point that I would have an erection but as soon as I would try to penetrate my girlfriend, I would lose my erection. This was a serious blow and lets say she and I were not happy campers. So since the beginning of 2014 I have not and will never use a penis extender ever again in my life. I have some theories as to what the issue was. I think extenders have a negative affect on EQ due to the fact your penis has to stay in a stretch state for a long time and circulation slowly decreases over time and I also think its not really going to have a impact compared to manual stretching or even hanging due to the fact it does not apply enough tension. I have tried the hanging thing too and I am not a fan of that either. But I think your BPEL is longer than your stretched state because you have a lot of smooth muscle inside of your penis and your tunica is your limiting factor. There’s a theory out there and it is just that, give it a read and come to your own conclusion. As for my suggestion I will tell you to stay with manual stretching with constant heat for a good period of time until you feel like you got a good stretch or even pass your BPEL, that should be your long term goal. Do not let your EQ suffer and do not hurt yourself in trying to accomplish this but take your time, it is a slow process. Also jelqing is the foundation to all PE exercises and should always be part of your routine and you might want to consider adding edging too. It will help with cementing your gains and EQ and should also be put at the tail end of your PE session, along with performing kegels. Good luck with your PE career. :-)
Starting Stats: BPEL 7.4", MSEG 5.1" [16 May 09]
Current Stats: BPEL 8.25", USEG 5.75'', MSEG 5.5", BEG 6.75'' [7 Jun 15]
Long Term Goal: BPEL 8.5", MSEG 6.5"