He didn't do well with the PF-extender, he didn't gain anything on his first 1000-hours. I believe he was over-training, he was doing an average of 11-hours a day of extender time and other PE-exercises (unsure exactly what) he didnt indulge to say. So, he went at it again for a second 1000-hours and disappeared after that 1000 hours run.
With the information I gathered on him. I think he was too agressive with it. More PE-training doesn't always mean better and more positive results, the human body doesn't work that way. I think he didn't give himself adequate recovery time after each PE-training.
I think guys read DLD's testimony on his PE-journey, about him training twice a day for months on end with his phenomenal results of 4-inches of PE-gains and think they should do the same.
The MOS member, Fedora, did very well with the PE-extender, with pictures as proof. But, since the SEPT'21 MOS Server crash, all his images are available because the links are all broken now.
Here's his PE-journey to 9 x 7 if you care to read it. You may find some useful information for your PE-journey with the PE-extender.