I have gained 1 "in length and 1.3" in thickness in 3 or 4 years and only with manuals. I stopped growing because of the pain that I do to my wife but if I would like to continue growing i could did it.
Manual training work better than pumping etc etc Jelqing has thousands of years of history ,With permanent growth and permanent benefits after cementing the profits.
This work for me nice; jelquing,sadsak slinkys,ULIs,horses and clamping.
I know cases of people who in 10 years or more have grown 2 "or more of girth only with manuals. So YES, your goals are more than possible and yes only with manuals.
But keep in mind that it has to be difficult and you will have to read a lot and work hard to achieve it.
I will not deny that many cocks here are naturally huge but many have made PE and do not accept it(I do not understand why).
The difference between manuals and pumpers is obvious. Some have more solid, lasting and real (more slowly) profits, and the others faster and more temporary.
You can only pump if you also do manuals because that way and only then you get the maximum and the best way of healthy PE.
Nice unit mate! 5.5" es un grosor muy bueno para empezar.
Escribo en inglés para que lo entienda la mayoría.
Un saludo desde Logroño!