Sorry if i can not give you an answer. I still have no measured yet and will not untill three months of use (probably about end may…).
Let me only say that i feel that is growing. The proof could be that yesterday I changed again the rods (I added the littel ones).
I could think that this fact could understand as a lenght grow, but as you probably know, flacid lenght increase does not mean atomaticaly erect lenght increase…
So, until a measure I will not be able to have a reliable proof that it is working.
As Guiri said, he has gain with a similar device, so why should this one not work?. What i think is that the gains come slowlier as other pe methods.