he is a whole lot bigger than you ever were. and im sure he already uses a shit load of drugs. why the hell does he need you to train him. sounds like a bullshit cross promotional gig to me.
I can't really speak to the whole giant setting thing, but you're smarter than this, man!
You know as well as I do that "he's bigger, so he should be the teacher" is pathetic reasoning. What about all those big dudes Charles Glass trained? Even though I don't think too highly of him as a trainer -- I loved it when Dorian took the piss out of him, talking about Glass and Dillett "jerking off with useless back training"

-- every other knucklehead does.
Really, the guy that struggled to build a good physique, especially clean, is the guy to go to for the best training advice. Asking Matarrazzo how to build arms or calves is like asking a Nigerian how to get as black as he is. And when hormones enter the picture, there's gH15 and no other.