It might work, if you let off parroting after a while, but I don't think this guide is kind to tulpae in any way, and given that it's not been tested by anyone, not even its creator, it's hard to say what issues would come about by using it.
Let me make 2 far-fetched guesses at possible bad side-effects:
1) Inability to tell apart your own parroting from the tulpa, or rather uninteresting tulpa
2) DID, median-like, if you begin identifying too much with the tulpa.
3) Pissed off tulpa, no growth period/no early memories
Let's see Fede try it and watch him report results back.