I had that Maxalding course when Matt Furey was selling it on his site. I sold it on Ebay.
I'm not watching any of the videos, but nothing in that Maxalding excerpt showed it was someone doing sets super slow.
Truthfully to get huge you need to train like Branch/Ronnie (as fast as humanly possible with heavy ass weight)
Tell that to Dillett.
He trained heavy sometimes (225 lbs for barbell curls)
Heavy weight is relative......lets not forget that.Not all of us can squat 800 pounds.............205 may be as heavy as 800 for you personally.
Phil Williams was training this way in the late 1980's.