As far as I figured there are other problems within this topic, like the basic understanding of chemistry (which I lack too, to an extend) of the ones executing this route or not 100% following advise.
As far as I understood, the way to obtain P2P was explained good enough in this topic and could be executed succesfully, whereas the way from P2P to the final product was referred to aswell, but couldn't be executed so far by the participants of the thread that you linked. Especially for the Leuckart reaction, there is a in depth report in the forum.
Please correct me if I'm wrong, I only remember that this post was not 100% successful for everyone just yet for several reasons. But not necessarily because not all important questions were answered