I've not heard of Manero before, but I don't think Suporn guarantees anything at all, let alone 6 inches. It might be common, but not a guarantee.
The differences between Spain and USA/Thailand are interesting.
I couldn't help but notice the title text (displayed in the tab) in Dr Manero's website, the use of "->-bleeped-<-" being unexpected. And it seems you need to be a "real transexual". Maybe translation issues?
Only one psych letter, but you need to see an endo. Looks like a GP is not enough.